Overview of SuperKEKB,�
Status and Plans�Contents	  	
  Overview	
  of	
  upgrading	
  KEKB	  to	
  SuperKEKB	  	  Comple9on	
  of	
  construc9on	
  for	
  Phase	  1	
  	  (Phase	
  1	
  commissioning)	
  -­‐-­‐-­‐>	  Funakoshi-­‐san’s	
  talk	  	  Status	
  and	
  plans	
  for	
  Phase	  2	
  K. AKAI�
Accelerator Laboratory, KEK�Jun. 13, 2016 @21th KEKB Accelerator Review Committee�
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�1�

Redesign the lattice to squeeze theemittance (replace short dipoles withlonger ones, increase wiggler cycles)
Colliding bunches

New superconducting final
focusing magnets near the IPe+	
  3.6A	e-­‐	  	
  2.6A	  	SuperKEKB	Nano-­‐Beam	
  scheme	
  	
  extremely	
  small	
  βy*	  	
  low	
  emiOance	
  Beam	
  current	
  double	
  Wiggler sections upgrade	" ± $ # *y ' I±*± y $ RL '
L=
& )
&1+ )
2ere % # *x ( + *y % Ry (40	
  9mes	  higher	
  luminosity	
  2.1x1034	
  -­‐-­‐>	  8x1035	
  cm-­‐2s-­‐1	  !

Improve monitorsand control system
Injector Linac upgrade RF electron gun
 improve e+ source

New e+ Damping Ring
Replace beam pipes with TiN-coatedantechamber-type ones
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�

Reinforce RF systems forhigher beam currents2�Machine Parameters
2013/July/29

LER

HER

unit

E

4.000

7.007

GeV

I

3.6

2.6

A

1.04

mA

2,500

Number of bunches
Bunch Current

1.44
3,016.315

Circumference

m

εx/εy

3.2(1.9)/8.64(2.8)

4.6(4.4)/12.9(1.5)nm/pm():zero current

Coupling

0.27

0.28



includes beam-beam

βx*/βy*32/0.27

25/0.30mm

83

Crossing angle

mrad

αp

3.18x10-4

4.53x10-4σδ

8.10(7.73)x10-4

6.37(6.30)x10-4

Vc

9.4

15.0

MV

σz

6.0(5.0)5(4.9)mm

νs-0.0244-0.0280

νx/νy44.53/46.57

45.53/43.57

U0

1.86

2.43

MeV

τx,y/τs43.2/21.6

58.0/29.0

msec

ξx/ξy

0.0028/0.0881

0.0012/0.0807

Luminosity

8x1035

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�():zero current():zero current

cm-2s-13�

Major points of construction�
•Main Rings (LER and HER)�

•Damping Ring (DR)�

•Injector�

•Infrastructure�

•At the same time, the existing resources of KEKB are used as much as
possible.�

– A large number of magnets and power supplies need to be rearranged, replaced, andadded to reduce the horizontal and vertical emittance of both beams. �– To cope with the electron cloud issues, ante-chamber type beam pipes are adopted
with a combination of TiN coatings, grooved shape surfaces, and clearing electrodes.
The ante-chamber is also used for mitigating heating problems in a part of HER.�
– A new final focus magnet system will be installed to squeeze βy* to 0.3 mm. �– The RF system needs to be strengthened with the accelerating cavities modified andrearranged to cope with the increased beam currents and power. �– The beam monitor and control system also are improved. �– A new 1.1 GeV positron DR is built to reduce emittance of positron beam before
injection into the LER.�
– The injector Linac needs to be upgraded including a new, low-emittance RF electron gun
and improvements to the positron source. �– Cooling system is reinforced for the increased heat load for magnets and vacuum
system. �– Buildings for increased number of power supplies for magnets, additional transformers
for RF reinforcement are newly built.�

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�4�

Commissioning phases�
•Commissioning will be performed in three phases. The three-phases scenario wasagreed between KEKB accelerator and Belle II groups.�

•Phase 1: No QCS, No Belle II solenoid:�
––Low emittance beam tuning�Vacuum scrubbing �
•
•

–
–

•

•

Belle II people request enough vacuum scrubbing in this stage (before Belle II roll in).�
At least one month at beam currents of 0.5˜1A /ring.�

Beast II study for beam background�
DR is not needed in this phase.�

Phase 2: with QCS and Belle II (w/o VXD)�
–
–
–
–
–

Low beta and small x-y coupling optics tuning�Beam collision tuning�
Belle II background study�DR commissioning�
Target luminosity at this stage is 1 x 1034 cm-2s-1�

––Physics run�
Improve luminosity�

Phase 3: Full Belle II detector with VXD installed�

Since	  construc9on	
  budget	
  supply	  is	
  un9l	  JFY2014,	
  the	
  cost	  needed	
  for	
  transi9on	
  from	  Phase	
  1	
  to	
  2	
  and	  3	  must	  be	
  supplied	
  within	
  annual	
  opera9on	
  budget	  and/or	
  supplementary	  budget.	
  	
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�5�

SuperKEKB master schedule�
・・・�

JFY2010�

JFY2011�

JFY2012�

JFY2013�

JFY2014�

JFY2015�

JFY2016�

JFY2017�

・・・�

Now (Jun. 2016)�

KEKB
operation�

Phase 2 commissioning:�
 Low beta* tuning� Collision tuning� Start physics data taking�SuperKEKB construction�
Dismantle KEKB�

Startup andconditioning�Phase 1 commissioning：�
 Low emittance beamtuning� Vacuum scrubbing�First day of removing magnets�

Phase	  1	  beam	  commissioning	
  ongoing	  	

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�Phase 3：�
 Install VXD to complete Belle II� Continue physics data taking�Phase 2、3�

Phase 1�SuperKEKB
operation�
DR�

Install QCS andBelle II�

For about
10 years�6�Completion of construction forphase 1�K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�7�

Magnet system upgrade�Replacement of bending magnets in LER (˜100) with new longer
Tunability of SuperKEKB LER cell	
ones to reduce horizontal emittance. �εx	
  (nm)	

•L= 0.89 m → 4 m•

Wiggler sections:�

αp	

– In LER, new 56 single pole wigglers and 112 half pole wigglers has been added to
the normal ones used in KEKB to double the wiggler cycles.�
– In HER, a new wiggler section has been constructed with reused wiggler magnets
from LER to reduce the HER horizontal emittance. �HER	
  wiggler	
  sec9on	completed	 future	LER	
  wiggler	
  sec9on	
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�8�

Tsukuba straight section�
•Completely new beam line �– All magnets, beam pipes, power cables in both sides of IP for about 300 m length
used in KEKB were dismantled.�
– Construction of new beam line is completed in early 2015.�
Nikko-side (L-side) of IR	

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�

Oho-side (R-side) of IR	

9�

Magnet system upgrade (cont'd)�
••••24 rotating sextupole magnets have been fabricated andRotating sextupole magnet	
installed. �Precise measurement and alignment of magnets in whole rings
performed in Jun-Sep 2015.�
Production of power supplies needed for phase 1 has been
completed. �Full-scale start-up tasks such as polarity check, cableconnection check, network test, magnet standardization test,
interlock system test and so on have been completed in time
for phase 1 commissioning.�
Wiggler magnets	
Power supply check	

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�10�

MR magnet system for QCS (for phase 2)�
QCS	
  power	  supply	
  cable	  laying	
  
work	
  to	
  B4	
  area	K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�New	
  survey	
  monuments	
  added	  and	  surveyed	
  for	
  phase2	
  QCS	
  installa9on	
  11�Vacuum system upgrade�•

To cope with the electron cloud issues in LER, ante-chamber
type beam pipes are adopted with a combination of TiN coatings,
grooved shape surfaces, and clearing electrodes. The antechamber is also used for mitigating heating problems in a part ofHER.�
– Beam pipes at LER arc section are replaced with new aluminum-alloy antechamber pipes (˜2000m). �– Copper ante-chambers are installed at wiggler sections in LER and HER. With
clearing electrodes for LER.�
– Tsukuba straight section for both rings are made new.�
• Optics changes. Ante-chambers are used, copper for most part.�

•Present copper beam pipes at HER arc section are reused. �– Since the HER energy is reduced from 8.0 to 7.0 GeV, SR power at normal arc
section for the design beam current will be about the same as KEKB. �– This reduces construction cost and work largely.�

•New collimators are developed under collaboration with SLAC. �– Two new horizontal collimators are installed in LER arc section.�
– More new collimators will be installed in LER and HER for phase 2.�

12�

Ante-chamber type beam pipe�Structure	
  

– SR	
  from	  beam	  is	
  guided	  to	
  the	
  ante-­‐chamber.	
  – NEG	
  pumps	
  in	
  the	
  ante-­‐chamber.	
  – TiN	
  coa9ng	
  inside.	
  

Concept	

Merits	  – Suppress	
  electron	
  clouds.	
  – Reduce	
  beam	  impedance.	
  – Reduce	
  SR	
  power	  density	
  at	
  the	
  wall.	
  



NEG	
  pumps	
  Material	
  

Beam	
  
SR	
  

– Copper	
  at	
  wiggler	
  magnet	  sec9on.	
  – Aluminum	  alloy	
  at	
  arc	
  sec9on	
  (reduce	
  cost	  and	  manufacture	
  9me).	
  Arc	
  sec9on	
  (aluminum)	
Wiggler	  sec9on	
  (copper)	
Inside view(clearing electrode for
wiggler section)

13�

Beam pipes treatments�
•Baking and TiN coating system have been constructed at Oho
experimental hall in KEK for treatment of beam pipes. �– More than 1000 beam pipes have been baked and TiN-coated. They were installedin the rings.�
Vacuum	  group	
  working	  deck	  in	
  Oho	
  exp.	
  building	  Four	
  baking	
  systems	
  opera9ng	
  on	
  the	
  upper	
  ﬂoor	  (B2).	
  Checking	
  and	  prepara9on	
  work	  on	
  the	
  middle	
  ﬂoor	  (B3).	
  	
  Five	  ver9cal	
  TiN	
  coa9ng	
  systems	
  from	
  B4	
  to	
  B2	
  through.	

B2	

B3	
B4	
Overview of Ring Construction Status and Schedule, Mar. 4, 2013, K. Akai�

Copper	  and	
  Aluminum	
  beam	  pipes	  aber	  baking	
  and	
  TiN	
  coa9ng.	
  They	  are	
  temporary	
  stocked	
  in	
  Oho	  B4	  un9l	  moved	  to	
  tunnel	  or	
  other	
  stock	
  houses.	
14�

North tunnel�

Beam	
  pipes	
  installed	
  into	  arc	
  sec9on	LER Gate valve in West tunnel�

15�New collimators�
•New low-impedance collimators�
– Beam collimators are devices to cut off halos around thebeam orbit and reduce backgrounds in Belle-II detector.�
– The new low-impedance collimators, which fit
antechamber scheme, are being developed incollaboration with SLAC. It has a pair of horizontally or
vertically opposed movable heads, which approach thebeam orbit.�– Two horizontal collimators were manufactured andinstalled at an arc section for test with beams in phase 1.�
– Mass production is scheduled from JFY2016 to JFY2016
to 2017 summer, in time for phase 2.�

Horizontal type collimator	

New	
  collimators	
  	
  
in	
  LER	
  for	
  Phase	  1	

Collimator head	

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�16�

RF-related parameters�
unit	
 KEKB	  (opera6on)	

SuperKEKB	  (design)	
  

Ring	

LER	

HER	
  

LER	

HER	

HER	
  (base	
  line)	

HER	

Wiggler	

Full	

None	
  

Full	

None	

6/10	

Full	

7.007	

7.007	

2.6	

2.6	

Beam	
  Energy	

GeV	

3.5	

8.0	

4.000	Beam	
  Current	

A	

1.8	

1.4	

3.6	

1585	

1585	

2500	

2500	

2500	

2500	

Number	  of	
  Bunches	

twice	

7.007	

twice	

2.6	Bunch	
  Length	

mm	

6	
  ~	
  7	

6	
  ~	
  7	

6	

5	

5	

5	

Energy	  loss/turn	

MV	

1.5	

3.5	

1.87	

2.07	

2.43	

2.67	

3.49E-­‐4	

4.55E-­‐4	

4.55E-­‐4	

4.54E-­‐4	

6.73	

5.38	

6.32	

6.94	

40	

40	

40	

1.09	

1.09	

1.09	

6.47	

7.41	

8.03	

12.4	

14.7	

15.8	

Momentum	  compac9on	
Radia9on	
  Loss	
  	

MW	

Loss	
  factor,	
  assumed	

V/pC	

30	

Parasi9c	
  Loss	

MW	

1.56	

Total	
  Beam	  Power	MW	~	
  3.5	

~	
  5.0	

8.30	RF	
  Voltage	

MV	

8.0	

15.0	

9.4	

•
•
•

2.7	

4.9	

three	
  9mes	Add HP&LL RF system and rearrange ARES cavities.�
Change ARES input couplers to larger coupling ones. �
Improve HOM dampers (ARES, SCC). �

Change	  to	
  1	
  Kly:	
  1ARES	  system	  (currently	
  1	
  Kly:	
  2	
  ARES)	

17�

RF system upgrade�
•
•

•
•

The RF system is reinforced to handle twice beam currents and much higher beam
power, with existing RF system reused as much as possible.�
The ARES and SC cavities, which have proven excellent performance during KEKB
operation, are reused with the improvements required for the input couplers and HOM
dampers. Configuration of the ARES changed: six cavities were converted from HER to
LER.�
The RF power source systems, including klystrons, waveguides and cooling systems,
are reinforced to provide larger beam power. �A new LLRF system, which is based on a recent digital control technique using FPGA's,
has been developed. For nine RF stations, among a total of thirty, the LLRF used in
KEKB has been replaced with new ones.�
RF	
  high	  power	  system	

1.2MW	  CW	  kystron	

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�Superconduc9ng	
  cavi9es	

18�

RF System (cont'd)�
6 ARES cavities in D5
relocated from HER to LER	

Upgrade	  of	
  Input	
  couplers	
  for	
  ARES	  cavi9es	
  
	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  PinputPc
Pbeam	

SuperKEKB 	
  :	
  750	  kW	  =	  150	  kW	  +	
  600	  kW	  KEKB 	  
	  :	  350	  kW	  =	  150	  kW	  +	
  200	
  kW	
  
Pc	
  =	
  150	  kW	  genera9ng	
  Vc	
  =	
  0.5	  MV	  per	  cavity.	
  

•
•
•

Status	
  	
  &	
  	
  Plans	  So	
  far,	
  13	
  input	
  couplers	
  have	  been	  processed	
  up	
  to	
  750-­‐800	
  kW.	
  Every	
  ARES	  cavity	
  in	
  Oho	  D5	  has	  been	  equipped	
  with	  an	
  upgraded	
  coupler.	
  	
  Addi9onally	
  in	
  Oho	  D4	  before	
  T=0,	
  upgraded	
  couplers	
  will	  be	
  installed	
  in	
  the	  RF	  sta9ons	
  each	  conﬁgured	
  as	
  one	
  klystron	
  driving	  one	
  ARES	  cavity.	
  Existing KEKB Analog
LLRF System#

New LLRF Control System #

e-	

e+	

μTCA crate#

Replace#
EPICS-IOC embedded#
μTCA-platformed FPGA Board#

New LLRF Control Systems#@OHO D5 Control Room	
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�

19�

D4	
1	

C	

2	

B	

2	

A	

D7	

D5	

OHO	
A	

B	

KEKB-­‐RF	

2	

1	

C	
 E	

E	

2	

2	

D	

C	

B	

A	

1	

2	

2	

A	

D10	
 NIKKO	
 D11	

D8	

FUJI	

B	

C	

D	

E	

2	

2	

D	
 C	
 B	
 A	

2	

2	

1	

A	
 B	
 C	
 D	
 E	
 F	

HER	
LER	
Crab	
  cavity	

3	
  power	  supplies	
  added	5	
  klystrons,	
  HP&LL	
  added	
D5	
D4	
 OHO	
2	

2	

2	

H	
 G	
 F	
 E	

C	

2	

A	

2	

SuperKEKB-­‐RF	
  (Phase	  1)	

4	
  old	
  VP-­‐klystrons	
  replaced	
  with	
  new	
  T-­‐klystrons	

1	
  power	  supply	
  upgraded	

2	

2	

A	
 B	
 C	
 D	
 E	
 F	

E	

2	

D	

FUJI	

D7	
2	

C	

B	

A	

1	

2	

2	

A	

D10	

D8	
B	

C	

D	

E	

2	

NIKKO	
D11	

2	

D	
 C	
 B	
 A	

2	

2	

A	
 B	
 C	
 D	

2	
  cavi9es	
  added	6	
  cavi9es	
  relocated	
  HER-­‐>LER	
2	
1	

4	
  cavi9es	
  removed	Type	
  “A”	
  power	  supply	
  (for	  two	
  klystrons)	
Type	
  “B”	
  power	  supply	
  (for	  one	
  klystron)	

Klystron,	
  HP&LLRF	
  system	ARES	
  cavity	SC	
  cavity	

The	
  RF	
  system	
  with	  reinforcement	
  done	  for	
  Phase	  1	
  can	
  support	
  70%	  design	
  beam	  current.	
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�20�

More	  RF	  reinforcement	
  plan	  to	
  further	
  increase	
  beam	  current	
  aGer	  Phase	  2,	
depending	
  on	
  budget,	
  demand	
  and	
  machine	
  performance.	

add	
  2	
  more	  klystrons,	
  HP&LL,	
  	
  
add	
  1	
  more	  	
  power	  supply	
OHO	

D4	
2	

2	

2	

2	

H	
 G	
 F	
 E	
 D	
 C	
 B	
 A	

add	
  2	
  more	  klystrons,	
  HP&LL,	
  	
  
add	
  1	
  more	  	
  power	  supply	

2	

2	

A	
 B	
 C	
 D	
 E	
 F	

F	
 E	

2	

2	
1	

2	

FUJI	

D7	

D5	

2	

D	

2	

C	

B	

A	

Type	
  “A”	
  power	  supply	
  (for	  two	
  klystrons)	
Type	
  “B”	
  power	  supply	
  (for	  one	
  klystron)	

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�

D10	

D8	
2	

2	

A	

add	
  2	
  SC	
  cavi9es	
  
add	
  2	
  klystrons,	
  HP&LL	

B	

C	

2	

D	
 E	
 F	

Klystron,	
  HP&LLRF	
  system	

2	

NIKKO	
2	

2	

D	
 C	
 B	
 A	

D11	
2	

2	

A	
 B	
 C	
 D	
 E	
 F	

ARES	
  cavity	SC	
  cavity	

21�

Beam instrumentation�
•BPM�
– A hundred twenty 508 MHz narrowband
detectors have been installed at the sitebuildings.�
– 117 units of gated turn-by-turn detectors
are completed for phase 1 commissioning. �– Several displacement sensors for BPM nearrotatable sextupoles have been installed.�
– New electronics for IP orbit feedback
system has been fabricated. The system
will be ready for phase 2.�

•Feedback System�New	
  narrowband	
  detectors	
   Displacement	
  sensor	
  near	
  a	
  
for	
  the	
  BPM	
  system.	
rotatable	
  sextupole	  magnets.	

iG12	
  digital	
  ﬁlters	

– Bunch-by-bunch feedback system has beenrenewed by making use of new bunch
detection electronics, 12bit digital filters
and longitudinal kickers. �– Two longitudinal kickers have been installed
in LER.�

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�Transverse	
  kickers	
  of	
  the	
  bunch	  feedback	
  system	  in	
  HER.	
22�

Beam Instrumentation (cont'd)�
•X-ray and visible light beam size monitors�
– X-ray and visible beam size monitors were completed in 2015. They are in use forbeam size measurement in phase 1 operation. �•

Large-Angle Beamstrahlung Monitor (LABM)�
– Components of the LABM were prepared at Wayne State University. The system
was installed at the IP in summer 2015.�

Detector	
  mount	  for	  the	  X-­‐ray	
  monitor.	
  (U	
  of	
  
Hawaii)	

Si	
  deep-­‐pixel	
  detectors	
  and	
  spectrometers	
  for	  the	
  X-­‐ray	
  monitor.	
  (SLAC)	

Extrac9on	
  mirror	

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�

Test	
  ﬁt	
  of	
  LABM	  extrac9on	
  mirror	
  (leb)	
  and	
  extrac9on	
  window	
  (right)	
  on	
  IR	
  beam	  pipe.	
23�IR for phase 1�
Addi9onal	
  shielding	
  walls	
  were	  constructed	
  in	
  autumn	
  2015.	
  	Gate	
  shape	
  concrete	
  shields	
  for	  the	
  IR	
  	

Beam	
  pipe	  installa9on	

Picture	
  of	
  IR	
  taken	  in	
  Sep.	
  2015	
  before	
  the	  IR	  is	
  covered	  by	
  large	
  concrete	
  shields.	
  	

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�24�

Final works for phase 1in JFY2015�
•Installation of remaining components and startup works for phase 1
have been completed, and phase 1 beam operation started in Feb.
2016.�
–
–
–
–
–
–
–
–
–
–

Installation of magnets completed in early 2015. �
The last component of beam pipes installed in Dec. 2015.�
Startup and electric current tests of magnets and power supplies.�
Final precise survey and alignment of magnets all around the ring.�
Complete lines of light monitors.�
Complete improvements of safety and control system.�
Reinstall concrete radiation shield blocks at four experimental halls.�
Operate refrigerators and cool down superconducting cavities.�
Startup klystrons and condition the ARES and SC cavities with high RF power.�
Startup vacuum, monitor, control and other systems.�

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�25�

Phase 1 commissioning�
Details	
  will	  be	
  presented	
  by	
  Funakoshi-­‐san.	
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�26�

Phase 1commissioning status�
Phase	  1	  milestones	
  	
  
	
  Feb.	
  1:	
  BT	
  tuning	
  started	  	
  Feb.	
  8:	
  LER	
  injec9on	
  tuning	
  started	  	
  Feb.	
  10:	
  beam	  storage	
  in	
  LER	  	
  Feb.	
  22:	  HER	
  injec9on	
  tuning	
  started	  	
  Feb.	
  26:	
  beam	  storage	
  in	
  HER	
  2/1/2016	

3/1	

Tasks	
  during	
  phase	  1	
  opera9on	  	
  Vacuum	
  scrubbing	  	
  Low	
  emiOance	
  beam	  tuning	  	
  Machine	
  studies	
  including	
  Beast	
  studies	
  

4/1	

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�

5/1	

Beam	
  current	
  
	
  	
  	
  	
  	
  830	  mA	  (HER)	
  
	
  	
  	
  	
  	
  910	  mA	  (LER)	

6/1	

6/12	

27�

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�Beam	
  current	
  (mA)	
  Beam	
  dose	  (A・h)	

Beam current and beam dose�

28�

Schedule plan and status forphase 2�K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�29�

SuperKEKB/Belle	  II	
  Schedule	
Calendar�Japan	  FY�2014�JFY2014�

2015�
JFY2015�
Power	  restric9on	
  
	
  	
  in	
  summer	

now	SuperKEKB	
  Construc9on�Start-­‐up�
Original	
  plan	  2016�
JFY2016�

2017�
JFY2017�

Power	  restric9on	
  
	
  	
  in	
  summer	

2018�
JFY2018�

Power	  restric9on	
  
	
  	
  in	
  summer	Power	  restric9on	
  
	
  	
  in	
  summer	phase	
  1�phase	  3�phase	  2�w/o	
  QCS	
   QCS,	
  Belle	  II�
w/	
  full	  Belle	  II�
w/	  QCS	
   VXD	  install�w/o	
  Belle	  II�
w/	  Belle	  II	
  (no	
  VXD)�

JFY2014	
  Opera6on	
  budget	
  
cut	
  by	
  12	
  Oku-­‐Yen	SuperKEKB	
  Construc9on�

Revised	
  plan	  in	
  early	
  2014	

Start-­‐up�

phase	  3�phase	
  1�phase	  2�w/o	
  QCS	
   QCS,	
  Belle	  II	
  install� w/	
  QCS	  VXD	
  install� w/	
  full	  Belle	  II�
w/o	
  Belle	  II�

w/	  Belle	  II	
  (no	
  VXD)�

More	
  realis6c	
  es6ma6on	
  of	
  schedule:	
  11	
  months	  for	
  phase	
  1-­‐>2,	
  6	
  for	
  phase	  2-­‐>3.	

(B)	
  Desirable	
  JFY2015	
  budget	SuperKEKB	
  Construc9on�phase	
  1�Start-­‐up�(A)	
  Conceivable	
  JFY2015	
  budget	SuperKEKB	
  Construc9on�Start-­‐up�w/o	
  QCS	  w/o	
  Belle	
  II�

QCS,	
  Belle	  II	
  install�

phase	  3�phase	  2�w/	
  QCS	
   VXD	  install� w/	
  full	  Belle	  II�
w/	  Belle	  II	
  (no	
  VXD)�

phase	  1�w/o	
  QCS	  w/o	
  Belle	
  II�

QCS,	
  Belle	  II	
  install�

phase	  3�phase	  2�w/	
  QCS	  w/	  Belle	  II	
  (no	
  VXD)�

VXD	
  install�

w/	
  full	  Belle	
  II�

Possible	
  scenarios	
  discussed	
  in	
  B2EB,	
  B2GM	  and	  BPAC	
  on	
  Nov.	
  2014.	
  JFY2015	
  budget	
  situa9on	
  turned	
  out	  to	
  be	
  close	  to	
  scenario	
  (A).	
  	
  K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�30�

Current situation (as of Feb. 2015)�
•In early 2014, the master plan was changed due to the significant
cut of JFY2014 operation budget for KEKB. �– Most of startup work needed before beam operation were postponed to JFY2015.�

•JFY2015 budget�– Budget request was sent from KEK to MEXT with the amount that is needed toperform all preparation works after construction to startup the accelerator
components and to start Phase 1 beam operation in autumn 2015 ("desirable"
scenario; (B)). �– JFY2015 budget including strong support from KEK turned out to be close to the"conceivable" scenario; (A), which allows us to start Phase 1 commissioning inearly 2016 within the period of JFY2015. �•

Construction and startup work has been rearranged and optimized tomeet the situation as much as possible.�

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�31�

Result of JFY2015 budget�•In early 2014, the master plan was changed due to the significant
cut of JFY2014 operation budget for KEKB. �– Most of startup work needed before beam operation were postponed to JFY2015.�

•JFY2015 budget�– Budget request was sent from KEK to MEXT with the amount that is needed toperform all preparation works after construction to startup the accelerator
components and to start Phase 1 beam operation in autumn 2015 ("desirable"
scenario; (B)). �– JFY2015 budget including strong support from KEK turned out to be close to the"conceivable" scenario; (A), which allows us to start Phase 1 commissioning inearly 2016 within the period of JFY2015. �•

Construction and startup work has been rearranged and optimized tomeet the situation as much as possible.�	
  SuperKEKB	
  has	  been	  proceeding	
  with	  scenario	
  (A)	
  with	  "conceivable"	
  JFY2015	
  budget.	
  Phase	  1	
  commissioning	
  started	  in	
  Feb.	
  2016.	
  	
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�32�

Budget situation in JFY2016�
•JFY2016 budget request was sent, which covers: �– Electricity charges and other cost needed to perform phase 1 operation for threemonths (April – June), and �– Cost for transition works from phase 1 to phase 2, which includes renovation of
the interaction region, Belle II roll in, startup of QCS, fabricating more collimators,
completion and startup of DR, Linac upgrade, etc. �•New schedule based on JFY2016 budget�– The FY2016 budget was announced last December, which turned out to be muchless than that needed to pursue these works on the earliest possible schedule. �– So, in the last January, we reexamined SuperKEKB/Belle II schedule plans for phase
2 and 3. The phase 2 start is shifted from before summer to after summer 2017,with an expectation for possible supplementary budget which comes early enough.�
– The new plan was agreed between the accelerator and Belle II groups.�

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�33�

Renovation for Phase 2�
•After phase 1 operation ends, renovation of MR from phase 1 tophase 2 will be conducted, which starts in July 2016.�
– QCS and Belle II installation and related works�
• Installation of QCS, cabling, piping, cool down, refrigerator test, and field measurements�• Belle II roll-in�– Related work to change IR configuration�
• Floor leveling, change concrete shields, remove/set normal-conducting magnets, etc.�

– More collimators �• Two collimators are used in LER for phase 1. Six collimators will be added for phase 2. �
• Furthermore, after phase 2, more collimators are planned to be added.�

– Change injection part of LER�• Septums and some vacuum components need to be changed to adopt low-emittancebeam from DR and to match to smaller aperture at the IR. �– Other improvements in LER and HER.�
• More turn-by-turn BPM detectors�
• Solenoid windings for electron-cloud, etc.�

•Installation and startup of accelerator components for DR continues
to start DR commissioning prior to (or during) phase 2.�
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�

34�

28	
  Jan.	
  2016	  @B2EB	
  SuperKEKB	  opera9on	
  schedule	
Calendar	
  year�

2016�

Japan	
  FY�
Now	

2017�

2018�

JFY2016�

JFY2017�

JFY2018�

JFY2019�

Summer	  shutdown	
  (power	  saving)	

Summer	  shutdown	
  (power	  saving)	

Summer	  shutdown	
  (power	  saving)	

Summer	  shutdown	
  (power	  saving)	

Previous	
  schedule	
  with	  desired	
  JFY2016	
  budget	
  phase	  1�w/o	
  QCS	  w/o	
  Belle	  II�phase	  2�MR	
  renova9on	
  for	
  phase	  2,	
  including	
  installa9on	
  of	
  QCS	
  and	  Belle	
  II	
  

MR	
  startup�DR	
  installa9on	
  &	
  startup�MR	
  startup�w/o	
  QCS	  w/o	
  Belle	  II�

w/	  QCS	  w/	  Belle	  II	
  (no	
  VXD)�

w/	
  full	  Belle	  II�phase	  3�VXD	
  installa9on�

DR	
  commissioning�New	
  schedule	
  based	
  on	
  JFY2016	
  budget	
  phase	
  1�

・・・�

2019�

w/	
  QCS	  w/	  Belle	  II	
  (no	
  VXD)�

phase	
  2�w/	
  full	  Belle	  II�phase	  3�MR	
  renova9on	
  for	
  phase	  2,	
  including	
  HER	
  start�
installa9on	
  of	
  QCS	
  and	  Belle	
  II	
  
LER	
  start� VXD	  installa9on�DR	
  installa9on	
  &	
  startup�DR	
  commissioning�

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�35�

Current status as of June 2016�
•Phase 1 oeration�
– Phase 1 operation has been progressing as planned with scenario (A).�
– Continuous efforts have been made to reduce operation cost.�

•Preparation for phase 2�
– So far no supplementary budget has come yet. �– Contract procedure is being made within available budget which is alreadyallocated. �– Best efforts are being made to fit to the new schedule. �

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�36�

Final focus SC magnet (QCS)�

•
•
•
•
•

Eight final focus QCS with 40 corrector coils are to be used. �
Corrector coils were wound at BNL under BNL/KEK collaboration.�
Fabrication of QCS-L magnet/crostat started in July 2012 andcompleted in Dec. 2015. Test of QCS-L is being conducted at an exp.
laboratory from Feb. through Jun. this year.�
Fabrication of QCS-R magnet/crostat will be completed in autumn 2016.�
After phase 1 operation ends in June 2016, QCS-L will be installed onbeam line, followed by QCS-R installation and Belle II roll-in. �
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�37�

QC1LP	
  magnet	SC	
  coils	
  for	
  QC1RP	  Completed	
  ESL	
  compensa9on	
  solenoid.	
  The	
  solenoid	
  was	  divided	
  into	
  12	
  small	
  solenoids.	
  	
  	
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�QC1LP	  collaring	
  work	  at	
  Mitsubishi	  Company	

Final	
  assembly	
  of	
  the	
  corrector	
  magnet	
  in	
  
BNL.	
  A	
  technician	  is	
  handling	
  the	
  cables	  from	  8	
  magnets	
  on	
  the	
  support	
  bobbin.	
  38�

QCSL	
  magnet	
  cryostat	
  was	
  delivered	
  to	
  KEK	  from	
  Mitsubishi	
  on	
  Dec.	
  25,	  2015.	
  QCSL	
  magnet	
  cryostat	
  was	
  set	  in	
  the	  Super.	
  Cryo.	
  Vac.	
  Experimental	
  Laboratory	
  at	
  Dec.	
  25	
  and	
  26,	  2015.	
  Drawing	  of	
  QCSR	
  cryostat.	
  QCSR	
  is	
  now	
  under	
  fabrica9on	
  at	
  Mitsubishi,	
  and	
  will	  be	
  completed	
  this	
  autumn.	
  K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�Single	  stretched	
  wire	  measurement	  was	
  done	  in	
  May	  2016,	
  under	  collabora9on	
  with	  FNAL.	
  39�

QCS/IR schedule for Phase 2�

9Jan2016: Ohuchi, 14Apr2016, 25Apr: Kanazawa
19May2016Ohuchi
Beam operation without QCS
Beam operation with QCS and without VXD
Physics Run
QCSL超伝導低温真空実験棟での冷却・励磁試験
IR解体作業

QCSL作業

1

2

3

4

5

6

2016
7

8

9

10

12

1

2

3

4

5

2017

6

7

8

9

10

11

12

QCSR納品

IRシールド取外し・Beast取外し・IRダクト外し
IR常伝導電磁石・ダクト・LABM・LM取外し・QCSL移動架台後退
シールド架台撤去

QCSLクライオスタットを移動架台に設置、移動架台動作確認、QCSL前進、ラフアライメント
ホロコン製作
ホロコン設置
架橋下ケーブル配線
架橋下冷却配管
架橋上電力ケーブル敷設（4極4台、ソレノイド1台、補正20台）
低温配管接続及び電流リード冷却ガス配管作業（完成検査準備・試運転調整含む）
QCS用液体窒素配管工事
クライオスタット、冷却システム信号線配線作業
電源信号線・インターロック線接続、検査
QCSLアライメント測量（IR磁石無し）
冷却機器・制御システム動作確認
冷却システム気密検査（クライオスタット含む）及び完成検査準備
QCSL冷却システム高圧ガス受検
QCSL冷却準備（ヘリウムガス置換・運転前気密検査・ガス純化運転・真空断熱槽排気）
QCSL冷却試験（マグネット冷却加温ソフト調整）
QCSL冷却励磁試験（インターロック試験・故障復帰ソフト調整）
QCSL冷却励磁試験（励磁試験）
QCSL加温低温配管取り外し・ケーブル信号線取外し・QCSL後退・Belleロールイン
QCSL前進・QCSL再組立・精密アライメント測量・冷却準備
QCSL再冷却QCSL電源調整
ESL用電源調整・ソレノイド電磁力・サポートロッド応力測定
QCSL磁場測定(1.ホール素子、2.ハーモニックコイル ）
SSW測定

役務
役務
役務

一般入札
一般入札
一般入札

役務 （一般入札）
製造
一般入札
役務
役務
役務
役務 一般入札？
役務
一般入札
役務
一般入札
役務
役務
役務
役務
役務

工場製作

現地据付工事K.	
  Kanazawa	  N.	
  Ohuchi	

完成検査・試運転調整

QCSL冷却
Belleロールイン(?)

役務
役務
役務
役務
役務
役務
役務
役務
役務
役務

QCSR作業
床工事、レール敷設
低温配管接続及び電流リード冷却ガス配管作業（完成検査準備・試運転調整含む）
クライオスタット、冷却システム信号線配線作業（？）
架橋上電力ケーブル敷設（4極4台、ソレノイド3台、補正23台）（？）
電源信号線・インターロック線接続、検査（？）
冷却機器・制御システム動作確認
QCSRクライオと移動架台接続、超伝導4極磁石磁場センター測定（SSW：日光実験室）
QCSRクライオスタットをビームラインにに設置、移動架台動作確認、QCSR前進、ラフアライメント
ホロコン製作
ホロコン設置
架橋下ケーブル配線
低温配管取付、電流リード冷却ガスライン接続、電力ケーブル・信号線接続
QCSRアライメント測量（IR磁石無し）
低温配管取り外し・ケーブル信号線取外し・QCSL後退・Belleロールイン
QCSR前進・低温配管取付・電流リード冷却ガスライン接続・電力ケーブル・信号線接続
QCSR精密アライメント測量、冷却システム気密検査（クライオスタット含）、完成検査準備
QCSR冷却システム高圧ガス受検
QCSR冷却準備（ヘリウムガス置換・運転前気密検査・ガス純化運転・真空断熱槽排気）
QCSR冷却試験（マグネット冷却加温ソフト調整）
QCSR冷却励磁試験（インターロック試験・故障復帰ソフト調整）
QCSR冷却励磁試験（励磁試験・電源調整）
ソレノイド電磁力・サポートロッド応力測定
QCSR磁場測定（1．低真棟での測定項目、2．ハーモニックコイル、
SSW測定

製造
役務
役務
役務
役務
役務
役務
役務
製造
役務
役務
役務
役務
役務
役務
役務

QCSL/R加温、低温配管取り外し、電力ケーブル・信号線取り外し、QCSL/R後退QCSL/R磁場測定パイプをビームパイプへ交換（クライオスタット先頭部交換）、RVC取付け
ビームパイプクライオスタット先端部
QCSL/R前進、ビームパイプとIPチェンバー接続、リーク試験
BPM付ベローズ短管
QCSL/R再組立
QCSL/Rヘリウムガス精製運転・冷却準備
QCSL/R冷却
IR常伝導電磁石据付
IR常伝導電磁石及びQCSアライメント
IR常伝導電磁石冷却水・配線・電気チェック
真空作業
LABM・LM取付け
LM用ビームパイプ
放射線シールド復旧

役務
役務
製造
製造
役務
製造
役務
役務
役務
役務
役務
役務
役務
役務
製造
製造・役務

Belle

11

一般入札？
一般入札

QCSL冷却（磁場測定）
現地据付工事

完成検査準備・試運転調整

一般入札？

＊(ME)

一般入札

QCSR冷却
役務
役務
役務
役務
役務
役務
役務

QCSR冷却（磁場測定）
特定調達
一般入札
一般入札

一般入札

一般入札
特定調達

Solenoid field measurement
Beast 2 installation

8 weeks (recent estimation)

Calendar Year

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�40�

Design parameters�
Parameter	

Value	

Energy	1.1	
  GeV	

Bunches	

2	
  x	
  2	

Circumference	

135.5	  m	H.	
  damping	

10.87	
  ms	Ext.	
  emiOance	
  (H/V)	

42.5/3.15	
  nm	

Max.	
  current	

70.8	
  mA	

Damping Ring�e+	
  beam	DR tunnerl construction�

Jun.	
  2012	

Dec.	
  2012	

DR facility building�DR power supply building�Mar.	
  2013	

Installa9on	
  of	
  accelerator	
  components	
  ongoing	Tunnel	  and	
  buildings	
  completed	
  (by	
  Mar.	
  2014)	

Mar.	
  2014	
K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�Sep.	
  2014	
41�

Damping Ring (cont'd)�
•Installation and startup status�
– Installation of all magnets has been completed.
Alignment of magnets on going.�
– All power supplies for the magnets (except ones forsteerings) have been delivered. �– Installation of beam pipes started.�
– After successful HP test, two RF cavities have been
installed into tunnel. �– Klystrons, power supplies, and other RF high powersystem on going. Startup of RF system is planned in
winter 2016.�
– The DR will be commissioned for phase 2 in JFY2017.�

power	
  supplies	
  for	
  magnets	
  	
  	

power	
  supply	
  for	
  klystron	  	  	

DR RF cavity
Cross section	
Cross section	

arc	
  sec9on	  	RF	
  cavity	
  for	  DR	  	

K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�cross-­‐sec9on	
  of	
  	
  
ante-­‐chamber	
  	
  
beam	
  pipe	  	arc	
  sec9on	
  	42�Summary�•Construction and startup works for phase 1 has been completed onschedule with the plan based on JFY2016 budget. �•In parallel with the phase 1 operation, preparation works for phase 2
including renovation of MR, startup of DR and improvements of Linac
continues. �•

After phase 1 operation ends, transition works from phase 1 to 2 will
start in July 2016. �•

Commencing time of phase 2 (and 3) depends on future budget
situation.�
– Schedule plans for the DR commissioning and Phase 2 and 3 start were
reexamined after the announcement of JFY2016 budget, which turned out to bemuch less than that required to pursue with the earliest schedule. �– A new plan is set with an expectation for additional budget which comes earlyenough. In this plan, phase 2 start is delayed after summer 2017, but phase 3
start is not delayed. This plan was agreed btw. accelerator and Belle II.�K. AKAI, Overview of SuperKEKB, status and plans, Jun. 13, 2016 @21th ARC�

43�