Overview of Ring Construction Status
and Schedule�
Contents	  	
  Overall	  plan	  	  Construc0on	
  status	  	  Schedule	
  in	
  JFY2015	  and	  2016	
  
K. AKAI�
Accelerator Laboratory, KEK�
Feb. 23, 2015 @20th KEKB Accelerator Review�K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

1�

Overall Plan�

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

2�

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	
  emiJance	
  Beam	
  current	
  double	
  Wiggler sections upgrade	" ± $ # *y ' I±*± y $ RL '
L=
& )
&1+ )
2ere % # *x ( + *y % Ry (40	
  0mes	  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 Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

Reinforce RF systems forhigher beam currents3�SuperKEKB master schedule�
・・・�

JFY2010�

JFY2011�

JFY2012�

JFY2013�

JFY2014�

JFY2015�

JFY2016�

JFY2017�

・・・�

KEKB
operation�
Dismantle KEKB�

SuperKEKB construction�
Startup,�
Conditioning,etc�For about 10 years�

SuperKEKB
operation�
Phase 1�DR�Phase 2, 3�

QCS install�
Belle II roll in�

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

4�

Commissioning phases�
•Phase 1: No QCS, No Belle II solenoid�– Basic machine tuning�– Low emittance 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.�

– DR is not needed in this phase.�

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

•

Low beta optics tuning�
Small x-y coupling optics tuning�Beam collision tuning�
Belle II background study�DR commissioning (starts before Phase 2)�
Target luminosity at this stage is 1 x 1034 cm-2s-1�

Phase 3: Full Belle II detector with VXD installed�– Physics run�– Improve luminosity �

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�5�

A	
  possible	
  plan	  presented	
  at	
  B2GM	
  on	
  18,	
  Jun.	
  2014.	

original�

Plan A3�
fastest	  scenario	
  without	
  early	  addi0onal	
  budget	  	No	  addi0onal	
  budget	
  to	
  cover	  the	
  JFY2014	
  opera0on	
  budget	
  cut	
  came.	

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

6�

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

2015�
JFY2015�
Power	  restric0on	
  
	
  	
  in	
  summer	

now	SuperKEKB	
  Construc0on�Start-­‐up�
Original	
  plan	  2016�
JFY2016�

2017�
JFY2017�

Power	  restric0on	
  
	
  	
  in	
  summer	

2018�
JFY2018�

Power	  restric0on	
  
	
  	
  in	
  summer	Power	  restric0on	
  
	
  	
  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	
  Opera.on	
  budget	
  
cut	
  by	
  12	
  Oku-­‐Yen	SuperKEKB	
  Construc0on�

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	
  realis.c	
  es.ma.on	
  of	
  schedule:	
  11	
  months	  for	
  phase	
  1-­‐>2,	
  6	
  for	
  phase	  2-­‐>3.	

(B)	
  Desirable	
  JFY2015	
  budget	SuperKEKB	
  Construc0on�

phase	
  1�Start-­‐up�(A)	
  Conceivable	
  JFY2015	
  budget	SuperKEKB	
  Construc0on�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	
  situa0on	
  turned	
  out	  to	
  be	
  close	  to	
  senario	
  (A).	
  	
  K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

7�

Current situation�
•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 Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

8�

Construction Status�

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

9�

Magnet System�
•Magnet installation and alignment �– Installation of most of normal conducting magnets will be completed by the end of
this JFY2014. �– Remaining magnets are for D1 arc section of length of about 30 m. They will be
installed in the beginning of JFY2015. �– The first round of alignment of magnets has been carried out.�
– Final precise alignment before Phase will be carried out in summer 2015.�

Removing the top half for
Nikko-side (L-side) of IR	
 Oho-side (R-side) of IR	
 vacuum pipe installation	

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

Magnet installation in
the mid-arc sections	

10�

Magnet System (cont'd)�
•Power supplies for MR magnets�

Cabling work	– Production of power supplies needed forPhase 1 has been completed. �– Cabling, piping, control system check areongoing.�
– Startup and electrical current test of 1MWclass power supplies for wiggler magnets anddipole magnets are ongoing. Startup ofsmaller PS's has also started.�
Wiggler magnets	

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

Power supply check	11�Vacuum System�
•

•

•
•

Most of vacuum components required forPhase 1 commissioning had been alreadydelivered.�Pre-baking and TiN coating of beam pipes
are on going. Allmost all new beam pipes
have been baked. �
Recent installation work is mainly focusedto the IR area.�
Approximately 98% of new beam pipes
have been installed on the whole.�

Un0l	
  Dec.	
  24,	  2014	

Beam pipes installed in Tsukuba IR area (Nikko side)	

Arc	

IP	

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

12�

Vacuum System (cont'd)�
•••Control system of various vacuum components has been upgraded. �
The activation of NEG pumps has begun in the tunnel from arc sections byusing the new control system.�
Special beam pipes such as beam size monitors using visible light and X-ray,
beam pipes with a Ti window for beam abort, beam pipes for beam injection
are being installed step by step. They will be completed in the beginning of
JFY2015.�
X-ray extraction chamber	Average pressure of lessthan 1x10-7 Pa is obtained
after NEG activation.

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

13�

Vacuum System (cont'd)�
•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 in collaboration
with SLAC. It has a pair of horizontally or vertically
opposed movable heads, which approach the beam orbit.�– Two horizontal collimators are being manufactured forPhase 1, which will be installed at an arc section for testwith beams.�
– Mass production is scheduled from JFY2015 to JFY2016
to be in time for Phase 2.�

Horizontal type collimator	

New	
  collimators	
  	
  
in	
  LER	
  for	
  Phase	  1	

Collimator head	

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�14�

Interaction Region (IR)�
Additional shielding walls
will be constructed by theend of autumn 2015. 	
IR cover and large gateconcrete shields will be set
to IR in autumn 2015. 	

Beam pipes at IP	

Iron support and concrete floor
already set at IP for Phase 1	
K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

15�

Final focus SC magnets (QCS)�
•Assemblies of the quadrupole magnets and corrector magnets areprogressing for the construction of the QCSL cryostat.�

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

16�

QCS (cont'd)�
•Construction of S.C. compensation
solenoid (ESL) is on going.�
– Although the solenoid had a damage of theelectrical insulation between the
superconducting cable and the support bobbin, Cold test of ESL was performed at
Mitsubishi well recovered the damage, and the KEK from Jan. 5th 2015. The ESL
was successfully excited to thesolenoid was delivered to KEK in Dec. 2014.�
design current without any quench.	
Completed ESL compensation solenoid.
The solenoid was divided into 12 small solenoids. 	

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

17�

QCS (cont'd)�
•Fabrication of QCSR�
– Main quads and solenoid coils have alreadybeen fabricated.�
– Fabrication of QCSR cryostat started July
2014. Will be completed by the end of 2015. �– The final assembly of QC1RE corrector coils
and QC1RP leak field cancel coils on the same
support bobbin is being carried out at BNL.
Will be delivered to KEK in February.�

•Power supply for QCS�– Two PS's for main quads and four PS's forcorrector coils have been delivered.�
– Test to check performances started in a test
bench at KEK.�
– Mass production is scheduled from JFY2015
to 2016 to be in time for tests of QCS in
beam line.�
Final assembly of the corrector magnet in
BNL. A technician is handling the cablesfrom 8 magnets on the support bobbin.
Test stand for power supply for QCS
K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

18�

RF System�•RF reinforcement for Phase 1 is almost completed. �
–
–
–
–

•

Add klystrons, power supplies and HPRF system�
Relocation for optimizing the ARES cavities�
Mass production of upgraded input couplers and installation to the ARES cavities�
Nine new LLRF control systems for D4 and D5 stations �Startup and adjustment work continues in JFY2015, followed bycavity conditioning in autumn and winter of JFY2015. �– This matches to SuperKEKB Phase 1 commissioning plan. �•

The RF system with reinforcement done for Phase 1 can support
70% beam current in LER and HER.�
– From our experience in KEKB, beam currents can only be gradually increased withimproving luminosity tuning and also by overcoming various issues arising from thehigh current beams. �– We believe possible limitation of machine performance due to RF power would only
come much later after Phase 2 commissioning. �•We have a senario to reinforce RF more to further increase beam
currents after Phase 2. �
– Schedule depends on demand, budget and machine performance.�
K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

19�

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

Upgrade	  of	
  Input	
  couplers	
  for	
  ARES	  cavi0es	
  
	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  PinputPc
Pbeam	

SuperKEKB 	
  :	
  750	  kW	  =	  150	  kW	  +	
  600	  kW	  KEKB 	  
	  :	  350	  kW	  =	  150	  kW	  +	
  200	
  kW	
  
Pc	
  =	
  150	  kW	  genera0ng	
  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.	
  	
  Addi0onally	
  in	
  Oho	  D4	  before	
  T=0,	
  upgraded	
  couplers	
  will	  be	
  installed	
  in	
  the	  RF	  sta0ons	
  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 Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

20�

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	
  cavi0es	
  added	6	
  cavi0es	
  relocated	
  HER-­‐>LER	
2	
1	

4	
  cavi0es	
  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 Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

21�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	

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

A	

D10	

D8	
2	

2	

2	

A	

add	
  2	
  SC	
  cavi0es	
  
add	
  2	
  klystrons,	
  HP&LL	

B	

C	

D	
 E	
 F	

Klystron,	
  HP&LLRF	
  system	

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

2	

NIKKO	
2	

2	

D	
 C	
 B	
 A	

D11	
2	

2	

A	
 B	
 C	
 D	
 E	
 F	

ARES	
  cavity	SC	
  cavity	

22�

Beam Instrumentation�
•BPM�
– Installation of BPM heads, restoration of BPM cables and installation of BPM
displacement sensors are in progress.�
– New narrowband detectors have been installed at the site buildings.�
– Calibration of turn-by-turn BPM's continues at a test bench.�
– Several displacement sensors for BPM near rotatable sextupoles have been
installed.�

•Feedback System�– Most components of the bunch feedback system have been installed in the tunnel.�
– Control system for the collision feedback system is being fabricated.�

New	
  narrowband	
  detectors	  for	
  the	
  BPM	
  system.	

Displacement	
  sensor	
  near	  a	
  rotatable	
  sextupole	  magnets.	

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

Transverse	
  kickers	
  of	
  the	
  bunch	  feedback	
  system	  in	
  HER.	
23�

Beam Instrumentation (cont'd)�
•X-ray and visible light beam size monitors�
– Final vacuum components of the X-ray beam size monitor are being fabricated.�
– Readout and detector development is continuing in collaboration with Univ. of
Hawaii and SLAC.�
– Diamond mirrors for visible light monitors have been installed in extraction
chambers and aligned.�
– X-ray and visible beam lines will be installed in 2015.�

•Large-Angle Beamstrahlung Monitor (LABM)�
– Components of the LABM are being prepared at Wayne State University. Its
installation is planned in summer 2015.�
Detector mount for
the X-ray monitor.
(U of Hawaii)	

Test fit of LABM extraction mirror (left) andextraction window (right) on IR beam pipe.	

Extraction mirror	
Si deep-pixel
detectors andspectrometers
for the X-ray
monitor.
(SLAC)	
K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

24�

Control System�•	  Solware	
  framework:	
  EPICS	
  (Experimental	
  Physics	
  and	
  Industrial	
  Control	
  System)	
  •	
  Upgrades	
  of	
  the	  distributed	
  IOC	
  (I/O	  Controller),	
  networks,	
  servers,	
  consoles,	
  0ming	
  system	  and	
  solware	
  are	  in	
  progress.	
  

With	
  a	
  CA	
  gateway,	
  we	
  directly	
  exchange	
  EPICS	
  data	  btw	
  SuperKEKB	
  and	  BelleII.	
  The	  CA	  gateway	  (Linux	  PC)	  is	
  installed	
  at	
  Tsukuba	
  B3,	  in	
  September	
  2014.	

EPICS	
  Embedded	
  PLC	  as	
  the	
  IOC	
  Example:	  Renewal	
  of	
  the	
  Vacuum	
  Control	
  System	  SuperKEKB	
  Control	
  network	
Database	
  Server	  (PostgreSQL	
  +	
  	
  
CSS	
  Archiver)	

EPICS
EPICS
IOC	
IOC	

Upgrade	  of	
  the	  VME-­‐based	
  IOC	
Example:	  Renewal	
  of	
  the	
  Abort	  Trigger	
  System	  K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�CA	
  Gateway	

BelleII	
  DAQ	
  network	
25�

Control System (cont'd)�
• Hard-wired signal between Belle2 and SuperKEKB:– Optical cables for the hard-wired signal (abort, injection control, timing)
between Belle2 and SuperKEKB were installed in September 2014.
– Currently, on demand from Belle2, we have developed the newsignal transfer scheme based on the sampling and parallel/serial
conversion using FPGA in order to increase signal lines.

• Operator interface tools were prepaired:– To access the EPICS record to control / monitor the accelerator– To access the archived data in KEKBLog (main archived database)and/or RDB stored with the CSS archiver.
Data browser based on CSS

Signal transfer scheme using FPGA

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�26�

Design parameters�
Parameter	

Value	

Energy	1.1	
  GeV	

Bunches	

2	
  x	
  2	

Circumf.	

135.5	  m	H.	
  damping	

10.87	
  ms	Ext.	
  emiJance	
  (H/V)	

42.5/3.15	
  nm	

Max.	
  current	

70.8	
  mA	

Damping Ring�e+	
  beam	DR tunnel construction�
Jun.	
  2012	

Dec.	
  2012	
DR facility building�Installa0on	
  ongoing	DR power supply building�Mar.	
  2013	DR	
  tunnel	
  and	
  buildings	
  completed	
  in	
  Mar.	
  2014.	

Mar.	
  2014	
K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�Sep.	
  2014	
27�

Damping Ring (cont'd)�
•Construction status�
–
–
–
–
–
–
–

•

Construction of the tunnel and buildings was completed.�
Magnet installation was completed for the beam transport lines (LTR and RTL). �
Installation of high power cables in the ring was completed.�
All power supplies for the magnets were delivered. (except for steerings) �
Beam pipes for the arcs were delivered and TiN coating is going on.� Magnets in tunnel	
Beam pipes for straights are in fabrication.�
Two RF cavities have been fabricated. Results of HP test exceeded specifications.�

Plan�– Installation and startup work continues in JFY2015.�
– Commissioning of DR will start in JFY2016 in the transition period between Phase
1 and 2.�DR RF cavity
Antechamber-type beam
pipe for arcs	

Magnets in LTR

Cross section	
Cross section	

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

28�

Summary of construction status�
•Most of hardware improvements required for Phase 1 operation will becompleted in this JFY2014, as scheduled. Appropriate rearrangements
and optimization has been made to fit to the operation budget situation.�
– Installation of magnets and beam pipes and other related components will be completed
in this JFY2014 except some parts (ex. in IR and injection). �– Evacuation and activation of NEG pumps started in the arc sections. �– Startup of magnet power supplies and electrical current tests are ongoing. �– RF hardware improvements will almost be done in this JFY2014. �– Monitor and control system hardware improvements are also steadily ongoing.�
– All major facility and infrastructure-related construction works have been completed. �•

Hardware improvements needed for Phase 2 are also ongoing to be intime for phase 2. �
– QCS and other components for the IR�•••Fabrication of QCSL cryostat will be completed in May 2015. Preparation for the test is ongoing.�
Fabrication of QCSR cryostat is ongoing. To be delivered by the end of 2015. �
Test of power supplies for QCS main and corrector magnets are ongoing. Mass production will be
carried out in JFY2015 and 2016 to be in time for the QCS test in the beam line.�

– DR�
•
•
•

Fabrication of all magnets was already done, and field measurement is ongoing. They will be
installed in JFY2015, together with beam pipes.�
High-power test of two accelerating cavities has been finished successfully.�
Installation of magnets at transport lines between DR and Linac and cabling for the power
supplies of ring magnets finished last summer.�

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

29�

Schedule in JFY2015 and 2016�

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

30�

Plan for Rings in JFY2015�
•Preparation work needed to start Phase 1�
–
–
–
–
–
–
–

•

Startup and electric current tests of magnets and power supplies.�
Final precise survey and alignment of magnets all around the ring.�
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.�

Work for Phase 2 that should be conducted in JFY2015�
– Install accelerator components in the DR, and startup them. �– Fabrication of QCSR and cooling pipes for QCS, cooling test of QCS at anexperimental hall, and startup of refrigerator at Tsukuba. �– Improvements for Phase 2 IR (more readiation shields, fabrication of beam pipes,etc.)�
– Fabrication of more collimators�
– Improvements of LER injection components.�

•Phase 1 beam operation�
– Based on latest estimation, it is possible to start Phase 1 beam operation early2016 within the period of JFY2015. �
K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

31�

Schedule of JFY2015-16�
Calender 2015

Calender 2016

JFY2015
4

5

6

7

8

9

10

Calender 2017
JFY2016

11

12

1

2

3

4

5

6

7

8

9

10

JFY2017
11

12

1

2

3

4

5

6

Overall schedule
MR system startup

Phase 1

QCS and Belle II install, IR renovation

Main Rings
Beam pipes installation (remaining parts)

Beam pipes installation (remaining parts)

Cooling pipes

Cooling pipes

Vacuum system startup
Magnets installation (remaining parts)
Magnets precise measuement and alignment
Electrical current test (local magnets)
Electrical current test (whole ring magnets)
RF startup (low power adjustments)

Vacuum system startup
Magnets installation (remaining parts)
Magnets precise measurement and alignment
Electrical current test (local magnets)
Electrical current test (whole ring magnets)
RF startup (low power adjustments)

RF high power conditioning

RF high power conditioning

Return concrete shields to four exp. halls

Return concrete shields to four exp. halls

Additional shields construction at Tsukuba

Additional shields construction at Tsukuba

Monitor system and control system

Startup and adjustments of monitor and control system

MR beam operation

Phase 1 MR beam operation

Phase 2

QCS and related IR hardware
QCS herium pipes, refrigerator test
QCSL fabrication and lab test
QCSR fabrication and lab test

QCS herium pipes, refrigerator test
QCSL test @exp. lab
QCSR fabrication

QCSR test @exp. lab

Set up and field test of QCS in beam line

QCS setup and field test in beam line

IR renovation for Phase 2, Belle II install

IR renovation for Phase 2, Bell II install

Damping Ring
Installation
System startup, adjustments and conditioning

DR installation
System startup, adjustments and conditioning

Beam commissioning(PF-AR direct injection construction)

DR beam commissioning (3 months)

DR(PR-AR direct injection construction)

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

32�

QCS construction schedule�
Calendar	
  Year	2015	

Calendar	  Month	

1

2

3

4

5

6

7

2016	
8

9

1
0

1
1

1
2

1

2

3

4

5

6

7

2017	
8

9

1
0

1
1

1
2

1

2

3

4

5

N.	
  Ohuchi	Design	
  and	
  Const.	
  of	
  QCSL	  Magnet-­‐Cryostat	
Installing	
  the	  QCSL	
  Cryostat	
  into	  the	  Experimental	
  Lab.	
  	
Cooling	  the	  QCSL	
  Cryostat	
  to	
  4K	
  and	
  excita0on	
  tests	
Magne0c	
  ﬁeld	  measurement	
  of	
  QCSL	  Magnet-­‐Cryostat	QCSL	
  test	  @exp.	
  hall	BNL	
  Corrector	
  Const.	
  for	  QCSR	
Assemblies	
  of	
  Quadrupoles	
  and	
  Correctors	
  for	  QCSR	
Field	
  measurements	
  of	
  the	
  assembled	
  magnets	
  by	
  ver0cal	
  cryo.	
Design	
  and	
  Const.	
  of	
  QCSR	
  Magnet-­‐Cryostat	
Installing	
  the	  QCSR	  Cryostat	
  into	  the	  Experimental	
  Lab.	
  	
Cooling	  the	  QCSR	
  cryostat	
  to	
  4K	
  and	
  excita0on	
  tests	
Magne0c	
  ﬁeld	  measurement	
  of	
  QCSR	
  Magnet-­‐Cryostat	QCSR	
  test	  @exp.	
  hall	
Installing	
  QCSL/R	
  Cryostats	
  on	
  the	
  Beam	  Lines	Cold	
  tests	
  and	
  Field	
  Meas.	
  of	  QCSL	
  and	  QCSR	
Re-­‐construc0on	
  of	
  IR	
  for	
  Beam	  Opera0on	

The	
  present	
  plan	
  includes	
  cold	  tesing	  of	  QCSR	
  prior	  to	
  install	
  in	
  beam	  line.	

Arimoto	  	
  works	
  for	
  SSW	  in	
  FNAL	

Phase-­‐1	
  commissioning	Phase-­‐2	
  commissioning	

Recommenda0on	
  from	  last	
  ARC	

The	
  schedule	
  to	
  complete	
  SuperKEKB	
  construc0on	
  and	  the	
  start	  of	
  beam	  commissioning	
  is	
  complicated	
  by	
  poten0al	
  changes	
  in	
  the	
  expected	
  funding	
  of	
  beam	  opera0on.	
  The	
  schedule	
  can	  be	
  ﬁrmed	  up	
  a	
  lot	
  aler	  the	  new	  JFY2014	
  budget	
  is	
  ﬁnalized	
  in	
  April-­‐May	
  2014.	
  In	
  case	  the	  FY2014	
  budget	
  cut	
  remains	
  unchanged,	
  a	
  modiﬁed	
  schedule	
  should	
  aim	  at	  proﬁ0ng	
  as	
  much	  as	
  possible	
  from	  the	
  addi0onal	
  4	
  or	
  7	
  months,	
  
e.g.	
  so	
  as	
  to	
  include	
  the	  cold	  tes0ng	
  of	
  right-­‐side	  IR	
  magnets	
  prior	  to	
  installa0on	
  and	  to	
  complete	
  the	
  vacuum-­‐system	
  set	
  up.	  	
K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

33�

QCS	
  and	
  IR-­‐related	
  work	  in	
  the	  transi0on	
  from	  Phase	
  1	
  to	
  2	

Current	
  es0ma0on	
  is	
  11	
  months	
  (including	
  1	
  month	  for	
  Beast	  II	
  installa0on)	
  

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�34�

Human Resources (KEKB ring staff)�
17th	
  ARC	  in	
  Feb.	
  2012	Date	

Needed	  FTE	

Available	
  FTE	  	
  (permanent	
  staﬀ)	

Dec.	
  2010	
  

77	

56	

Apr.	
  2011	
  

77	

60	

Apr.	
  2012	

77	

62	

Change	  in	
  three	
  years	  (2012	
  –	
  2015)	
New	
  
(Δ	
  FTE	  =	
  +1/
person)	

Re.re(1)	
  (FTE	
  decrease)	
-­‐0.5	

Re.re(2)	
  tenure	  to	
  Change	  of	  FTE	
  
(FTE	
  no	
  change)	
 permanent	  (Total	  FTE	
  change)	
(FTE	
  no	
  change)	

Apr.	
  2012	

+3	

(2)	

(2)	

+2.5	

Jul.	
  2012	+2	

Apr.	
  2013	

+1	

-­‐0.5	(3.5)	

(2)	

+0.5	

Apr.	
  2014	

+2	

-­‐1.0	

(3)	

(1)	

+1.0	

Apr.	
  2015	

+2	

-­‐1.5	

(4)	

(1)	

+0.5	

Total	  FTE	
  change	

+10	-­‐3.5	

0	

0	

+6.5	

+2	

Slow	
  improvement	
K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�

35�

Summary�•Construction for Phase 1 commissioning is in the final stage. Startup
work continues in JFY2015. �– Most of hardware improvements required for Phase 1 MR operation will becompleted in this JFY2014, as scheduled.�
– The master plan of construction and startup was changed due to the significant
cut of the KEKB operation budget in JFY2014. Rearrangements and optimizationof construction and startup works have been made to fit to the situation.�
– Preparation works to start beam operation, including high-power conditioning of
RF cavities, final alignment of magnets around the ring, restore radiation shielding,and startup magnet, vacuum and beam monitor system, will be continued in
JFY2015. �••

Based on latest estimation of budget allocation in KEK, it is possible
to start Phase 1 beam commissioning early 2016 within the period of
JFY2015. �
In parallel, works required to prepare for Phase 2 continues toproceed the Phase 2 commissioning on time. �– QCS, IR renovation, LER injection improvement, beam collimators and the DR. �

K. AKAI, Overview of Ring Construction Status and Schedule, Feb. 23, 2015 @20th KEKB Review�36�