March 25, 2024

2024a Run
Y. Ohnishi

2024a Operation History
Vacuum Scrubbing: January 29 - Feb. 20
β*y = 8 mm Collision: Feb. 20 - Feb. 28β*y = 3 mm Collision: Feb. 28 - March 5β*
y = 1 mm Collision: March 6 Crab Waist OFF until March 18
Crab Waist ON since March 18
LER: 80 % and HER 40 %Increase Beam Currents with 2346 Bunches
Machine Troubles
LER Injection Kicker Accidental Fire
Chiller and Cooling Water Pump Trouble (OHO)
LER RF D07B Klystron End Of Life
Magnet PS Trouble (SD3ORE and QFROE_4)
2

Summary of 2024a Operation
Physics Runβ*
y = 1 mm
CW: 80 % (LER) and 40 % (HER)
LER: 800 mA and HER: 640 mA with 2346 Bunches
L = 1.9 x 1034 cm-2s-1
Luminosity Performance Is Back to the Performance of 2022ab Run.
Single Beam Vertical Emittanceεy = 10 pm - 20 pm ↔ 25 pm - 35 pm in 2022b Run
Key Point: Beam Orbit at IP and at Strong Sextupoles with BBA
Injection Efficiency
LER: 100 % and HER: 20 % from Scratch
HER is Still Poor Efficiency.
3

List of LS1 Upgrades

LER Nonlinear Collimator (D05V1)
HER Injection Region
New IP Beam Pipe and Tungsten Shielding at the IP Bellows
Replacement of Damaged Collimator Head, Carbon(Low-Z) Head, and Adoption of Cu
Coating
QCS Cryostat Modification and Vacuum Leakage Repair (R-Side)
Various Monitors to Detect Sudden Beam Loss in LER and Fast Beam Abort System
Injector Linac Upgrade

4Expected Improvements by LS1 Upgrades
LER Nonlinear Collimator (D05V1)
Reduce Stored Beam Background without Increasing Impedance. → Suppress -1 Mode Instability

HER Injection Region
New Beam Pipe with Larger Aperture and New Septum with Better Field Quality

New IP Beam Pipe and Tungsten Shielding at the IP Bellows
Mitigate SR Hitting on PXD and Reduce BG due to Beam Loss at QCS-IP Bellows
Flexibility of Beam Orbit at IR (No Horizontal Angle Required) → Allow Low Emittance Tuning

Replacement of Damaged Collimator Head, Carbon(Low-Z) Head, and Adoption of Cu Coating
Reduce Impedance and Good BG Suppression → Suppress -1 Mode Instability

QCS Cryostat Modification and Vacuum Leakage Repair (R-Side)
Reduce BG

Injector Linac Upgrade
Stable Injection and Good Quality of Injected Beam

5

Beam-Beam Performanceβ*y = 1 mm: Crab Waist OFF and ONβ*
y = 1 mm: Crab Waist OFF
March 12, 2024: CW 0 %νy+ = .567

νy+ = .567

νy+ = .59

νy+ = .59

LER Beam Is Blowup Easily. LER Is Weaker than HER.
LER Vertical Tune Helps to Suppress LER Blowup.
2024a HBC data is consistent with 2019 data.

Beam-Beam Parameter (Crab Waist OFF): ξy−~0.026
Physics Run 2022 (Crab Waist ON): ξy = 0.028
6

Beam-Beam Performance (cont'd)D. Zhou et al., Phys. Rev. Accel. Beams 26, 071001 (2023)<latexit sha1_base64="H7Gw5xzHdASmLYCx+qSuxUYC3UE=">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</latexit>⌫x + 4(⌫y + ⇠y ) = N
Beam-BeamResonance
Better Working Point
at Higher Bunch Current
Collision

Chromatic
X-Y Coupling
Resonance
This Resonance is Weak.
→ Rotating Sextupoles"Fine Tuning"

7

Beam-Beam Performance (cont'd)March 21, 2024: CW 80 %(LER) / 40 %(HER)

1.06 x 1034 cm-2s-1
393 Bunches

HER Injection
Difficultνy+ = .567
νy+ = .59

Crab Waist Improves Specific Luminosity at Higher Bunch Current Product.
Vertical Tune Dependence of "CW ON" Is Weaker than "CW OFF".
Beam-Beam Parameter (CW ON): ξy− = 0.031 at Ib+ = 0.72 mA ↔ 0.026 (CW OFF)2024a Data (CW ON) Is Consistent with 2022a Data (CW ON).
8

Dynamic and Physical Aperture Measurement
Vertical Kicker in HER

K. Kodama, T. Naito, H. Kaji, et al.

New Tools:
Horizontal Aperture Measurement
Injection Kickers (Balance of Two Kickers)
Vertical Aperture Measurement
Vertical Kicker
RF Longitudinal Kicker

HER Only
Momentum Acceptance Measurement
RF Longitudinal Kicker
LER or HER

9

K. Kobayashi, S. Ogasawara, et al.

px(n) = 2Jx x cos(2⇡⌫x n +<latexit sha1_base64="kwj5WV2pnp/67SwD+4zaSnnTBr4=">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</latexit>

Fit Horizontal/Vertical Oscillation

Horizontal0)

βx : Model

VerticalHER RF Kick

LER RF Kickβ*y = 8 mmβ*y = 1 mmΔp/p0 = 0.69 %Δp/p0 = 0.61 %LER Aperture
βy*

8 mm

3 mm

1 mm: CW OFF

1 mm: CW 80 %Feb. 19, 2024

March 4, 2024

March 6, 2024

March 18, 2024

2Jx (m)2.5 x 10-625 σx9.49 x 10-715 σx2.24 x 10-6
23.6 σx4.88 x 10-635 σx1.13 x 10-6
16.8 σx3.37 x 10-629 σx8.99 x 10-7
15.0 σx3.37 x 10-629 σx

γ2Jy (µm)

-

-

-

-

Feb. 27, 2024

Feb. 29, 2024

March 6, 2024

March 18, 2024

0.58
1.03

0.38
1.26

0.53
1.33

0.61
1.11

Δp/p0 (%)

green: Tracking Simulation with Collimator Aperture

HER Apertureβy*

2Jx (m)γ2Jy (µm)

8 mm

3 mm

1 mm: CW OFF

1 mm: CW 40 %Feb. 20, 2024

March 4, 2024

March 5, 2024

March 18, 2024

3.89 x 10-6
28.9 σx2.92 x 10-625 σx2.11 x 10-6
21.8 σx3.31 x 10-627σx1.34 x 10-6
17.4 σx2.77 x 10-625σx1.13 x 10-6
16.0 σx2.77 x 10-625σxFeb. 26, 2024

Feb. 29, 2024

March 14, 2024

March 18, 2024

1426
6413

1187
3982

649
973

712
973

-

-

-

Feb. 20, 2024

Δp/p0 (%)

0.69
1.07

green: Tracking Simulation with Collimator Aperture

Measured Vertical Emittance of Injection Beam: γεy = 120 - 360 μm

Nonlinear Collimator Study (Preliminary)

Background Suppression of Storage Beam Is Good.
Background Suppression of Injection Beam Is Not Sufficient. Because Horizontal Orbit
Reduces the Collimator Performance. Injection Beam Has Large Horizontal Beam
Oscillation. → βx at Skew Sextupoles Can Be Small to Reduce Horizontal Amplitude.
Still Under Commissioning<latexit sha1_base64="g/Ft/rp7sHbrlWXeJvti5KguQS8=">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</latexit>

py =
14

(skew)
K2

2

(y 2

x2 )

(βx = 7.08 m to 2 m)

Plan of 2024b

15

Machine Parameters
June 8, 2022

Target at post-LS1 (1)Target at post-LS1 (2)

Unit

Ring

LER

HER

LER

HER

LER

HER

Emittance

4.0

4.6

4.0

4.6

4.0

4.6

nm

Beam Current

1321

1099

2080

1480

2750

2200

mA

2249

Number of bunches

2346

2346

Bunch current

0.587

0.489

0.89

0.63

1.17

0.94

mA

Horizontal size σx*

17.9

16.6

17.9

16.6

17.9

16.6

μm

Vertical cap sigma Σy*

0.303

0.217

0.178

μm

Vertical size σy*

0.215

0.154

0.126

μm

Betatron tunes νx / νy44.525 / 46.589 45.532 / 43.573 44.525 / 46.589 45.532 / 43.573 44.525 / 46.589 45.532 / 43.573

βx* / βy*80 / 1.0

60 / 1.0

80 / 0.8

60 / 0.880 / 0.6

60 / 0.6

mm

σz

4.6

5.1

6.5

6.4

6.5

6.4

mm

Piwinski angle

10.7

12.7

10.7

12.7

10.7

12.7

Crab waist ratio

80

40

80

80

80

80

Beam-Beam ξy

0.04070.02790.04440.03560.06040.0431%

Speci c luminosity

7.21 x 1031

7.62 x 1031

9.31 x 1031

cm-2s-1/mA2

Luminosity

4.65 x 1034

1 x 1035

2.4x 1035

cm-2s-1

fi1035 and 2.4 x 1035 are tentative and considered by Y. Funakoshi.

16Strategy Toward 2.4 x 1035 cm-2s-1
L
Lsp =Ib+ Ib nb<latexit sha1_base64="+SRgfvdhxFx/L1SC48DiIHoQ3b4=">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</latexit>

Target Beam Currents of 2024awith β*y = 1 mm2.75 A / 2.2 A

2.08 A / 1.48 A
Increasing Bunch
Currents

Strategy of 2024b Run
Vertical Emittance of Single Beam Is Better than 2022ab Run.
Luminosity Performance Reaches the Same Level as 2022ab Run.
Lsp = 6.5 x 1031 cm-2s-1/mA2 at Ib+Ib- = 0.41 mA2 (Ib+ = 0.72 mA)
L= 6.5x1031 x 0.41 x 2346 = 6.25 x 1034 cm-2s-1

Plan of 2024b Run
34 cm-2s-1.
=
1
mm
Operation
Will
Be
Continued
toAchieve
6-8
x
10
β*
y

LER: 2 A / HER: 1.4 A / 2346 Bunchesβ*y = 0.8 mm Will Be Adopted in June After Above Achievement.
Injection Will Constrain Beam Currents.
Two-Bunch Injection, 25 Hz Repetition, Sextupole Optimization (Enlarge DA), Synchrotron
Phase Space Injection (HER), Investigation of Narrow Vertical Aperture (HER), etc.
18

T. Ishibashi
Number of Bunches Is Fixed at 2346 Bunches.

19

T. Ishibashi

20Reference

Nonlinear Collimator (S. Terui)
Injection (T. Yoshimoto)
Optics (H.Sugimoto)Sudden Beam Loss (H. Ikeda)
Overview of Collective Effects (D. Zhou)
QCS (T. Oki)
Vacuum (K. Shibata)
Injector Overview (M. Satoh)21

Appendix

22

Beam Kick by Skew Sextupole• Multipole expansion∑(( , )==1

3, ( , ) =3sin( ))( )+3

cos(3 ) =

3(

3

−3

) (skew-sextupole)2• Magnetic field of skew-sextupole= -3 3( 2 − 2),

=−

• SK2

2

2=

2

=

=−

=6 3

V-kick does not depend on sign of v-position.
Only one side vertical collimator is needed (top or bottom).

6 3• Beam kick by skew-sextupole

Horizontal offset reduces v-kick.
A particle with both x and y offset
receives horizontal kick also.

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∞

Y. Funakoshi

=

2

2

(

2

−

2

), Δ

=

=

2

23

Y. Funakoshi

Collimation in (x,y) Plane
7.1mm
10

Usual collimator

y1 =
y2 =
2
y2 =

p
p

6.8mm
Nonlinear collimator

0-5

Aperture:<latexit sha1_base64="7X5siyb2A5f3Wgf4Zc351DAUA8A=">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</latexit>

y [mm]

5

2Jy y12Jy y2@ D06V1- 10@ Skew Sextupole

-2

0

2

4

x [mm]

3.3mm

y2 2
y1
y1

y3 = R34

-4

SK2 2
SK2
y2 = R34
py2 = R34
2
2

y2 2
y1
y1

@ D05V1

This curvature can be reduced by reducing βx at
skew sextupoles.

LER β*y = 8 mmFeb. 19, 2024

2Jx = 2.5 x 10-6 m

Hor. Collimator
Aperture ?

µ)

2Jx (m)23.6 σx

March 4, 2024

Erf (xp
1+
2◆Loss Rate

25 σx

LER β*
y = 3 mm

Loss Rate1f (x) =
2✓2Jx (m)March 6, 2024

16.8 σxLER β*
y = 1 mm CW: 80 %Loss Rate

Loss Rate<latexit sha1_base64="YZzweag+p5CEjaggmruoVGPxn24=">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</latexit>

LER β*
y = 1 mm CW: 0 %2Jx (m)15.0 σx

March 18, 2024

2Jx (m)Feb. 20, 2024

HER β*
y = 8 mmMarch 4, 2024
<latexit sha1_base64="YZzweag+p5CEjaggmruoVGPxn24=">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</latexit>

Loss Rate

Feb. 26, 2024µ)

Loss Rate

28.9 σxErf (xp
1+2◆2Jx (m)γ2Jy = 1426 μm

2Jy (m)21.8 σxFeb. 29, 2024

Loss Rate

Loss Rate1f (x) =2✓

HER β*
y = 3 mm

2Jx (m)γ2Jy = 1187 μm

2Jy (m)<latexit sha1_base64="YZzweag+p5CEjaggmruoVGPxn24=">AAACpXichVHLShxBFD12ojHjY0azCWQjDuoMwaFagoZAYEgIZCP4mlGwZehuq8fCflldM8Q0/QP5gSxcGUhC8DOyycKtgp8gLg1k48LbPQ0hiuY2XXXq3HtunaqyQldEirGzPu3Bw/6BR4OPC0PDI6PF0th4Mwo60uYNO3ADuWGZEXeFzxtKKJdvhJKbnuXydWv3bZpf73IZicBfU/sh3/LMti8cYZuKqFap7lQ+VF8bjjTtWE/iucRwuaMq+vMe9U5SftbwOtUkNqI9qdKKSLQ9MzGkaO+oaqtUZjWWxcRtoOegjDyWgtJ3GNhGABsdeODwoQi7MBHRtwkdDCFxW4iJk4REludIUCBth6o4VZjE7tLYptVmzvq0TntGmdqmXVz6JSknMMVO2A92yX6xI3bOru7sFWc9Ui/7NFs9LQ9bxU9PV//8V+XRrLDzV3WvZwUHLzOvgryHGZOewu7pux8/X66+WpmKp9kXdkH+D9kZ+0kn8Lu/7a/LfOUABXoA/eZ13wbNuZo+X5tfflGuv8mfYhDPMIkK3fcC6niPJTRo3284xglOtRltUVvTmr1SrS/XPME/obWuAUMLow4=</latexit>

17.4 σx

Loss Rate

March 14, 2024✓

Erf (x
p
1+
2

µ)

◆

HER β*
y = 1 mm CW: 40 %16.0 σx

2Jx (m)2Jx (m)γ2Jy = 649 μm

Loss Rate

Loss Rate1f (x) =
2

March 18, 2024

Loss Rate

March 5, 2024

HER β*
y = 1 mm CW: 0 %2Jy (m)γ2Jy = 712 μm

2Jy (m)D01H4 D01H5 D02H4 D02H3 D02
W
W

Collimators

Ta (Cu)
IR
ee+
D02H1
W
D01V1
D02V1 D02H2
W
D01H3
W
D12V4
D12
D12H4 Ti (Cu) W
W
TSUKUBA Ta (Cu)
D12V3
D03H1
D12H3 Ti (Cu)W
D12H2 Ti
D12V2 Ti (Cu)
D12H1
D12V1 Ti
SuperKEKB
Main
Ring
Ti (Cu)

D09V4
D09H4
D09V3
D09H3

WIGGLER

OHO

NIKKO

SC
SC

WIGGLER

D10

D05V1
Ta (Cu)

ARES

D04

LER

HER

ARES

D11

D03

WIGGLER

D01

D05
Ti (Cu)

D09H2
D09H1
D09V2
D09V1

HybridFUJI

Ti (Cu)

D06V1
D06H4
C (Cu) D06H3
Ta

D09

e-

e+
ARES

D08

ARES

D06V2

D06

28

D07

Injection Beamβ*y = 3 mmβ*y = 1 mm2Jx = 7.98 x 10-7 m

2Jx = 5.66 x 10-7 m
Horizontal Aperture Is OK ?

Injection Beamβ*y = 3 mminjectionβ*y = 1 mm

2024

January
27
(Sat)

28
(Sun)

29
(Mon)

C: OwlTunnel Patrol (1 h)HER βy* = 81.0 mm
Hardware Check

A: DayFind HER COD
HER RF OFF

Find HER COD
HER RF OFF

B: Evening

Find HER COD
HER RF ON
HER 30 turns
HER Tune (H) Adj.
Stored Beam (0.26 mA)

February
30
(Tue)

31
(Wed)

1
(Thu)

2
(Fri)

HER Vacuum Scrubbing
3 mA

HER Vacuum Scrubbing
60 mA
LER RF 10 kW KeepHER Vacuum Scrubbing
100 mALER Vacuum Scrubbing
100 mAHER Vacuum Scrubbing
140 mALER Vacuum Scrubbing
160 mA

HER BCMHER BxB FB Adj.

HER BPM Gain Mapping

LER Abort Adj.

HER BxB FB Adj.

LER RF ON
HER X-Y Coupling Corr.
LER > 100 turns
HER Beta Corr.
Stored Beam (6 mA)
HER Ver. Dispersion Corr. LER BCM
LER BxB FB Adj.

HER vacuum scrubbing
60 mA

LER Skew Sextupole(SK2: -6 to -1 m-2)
LER Orbit at D05V1

LER βy* = 48.6 mm(SNAP βy = 100 m)
Find LER COD
LER RF OFF
LER 4 turns

LER Orbit at D05V1
LER X-Y Couppling Corr.

LER D05V1 Orbit(Local Bump Adj.)LER X-Y Coupling Corr.
LER Beta Corr.
LER Ver. Dispersion Corr.

LER Tune Setting Trouble
Acoustic Sensor (SBL)HER Orbit Corr.
LER Orbit Corr.
LER X-Y Coupling Corr.
Acoustic Sensor (SBL)LER Beta Corr.
LER Ver. Dispersion Corr.

LER Injection Tuning
Acoustic Sensor (SBL)LER TBT BPM (Injection) HER Injection Tuning
LER BxB FB Adj.
HER TBT BPM
31

2024

C: OwlFebruary
3
(Sat)

4
(Sun)

5
(Mon)

6
(Tue)

7
(Wed)

8
(Thu)

9
(Fri)

HER Vacuum Scrubbing
155 mALER Vacuum Scrubbing
160 mAHER Vacuum Scrubbing
330 mALER Vacuum Scrubbing
330 mAHER Vacuum Scrubbing
400 mALER Vacuum Scrubbing
325 mAHER Vacuum Scrubbing
400 mALER Vacuum Scrubbing
330 mAHER Vacuum Scrubbing
400 mALER Vacuum Scrubbing
340 mAHER Vacuum Scrubbing
500 mALER Vacuum Scrubbing
400 mAHER Vacuum Scrubbing
540 mALER Vacuum Scrubbing
450 mAHER 540 mA
LER 450 mALER Chromaticity
LER D05V1 Study

LER/HER Chromaticity
LER Aperture Study(Hor. Inj. Kicker, TBT
BPM)

LER Magnet Trouble(BLX4LP, QC1_2RP B3)

Injection Study
BT (p) Study

NEG Activation

A: DayHER Vacuum Scrubbing
250 mALER Vacuum Scrubbing
250 mAHER Vacuum Scrubbing
400 mALER Vacuum Scrubbing
340 mANEG Activation

B: Evening

HER Vacuum Scrubbing
300 mALER Vacuum Scrubbing
300 mAHER Vacuum Scrubbing
400 mALER Vacuum Scrubbing
330 mA

HER BPM Gain Mapping
HER Quad BPM
LER BPM Gain Mapping
LER Quad BPM

HER Orbit Correction
LER Orbit Correction
HER Optics Correction
LER Optics Correction

Injection Kicker Tuning
HER RF Kick Test

Collision Bucket Timing
LER Orbit Correction

LER βy* = 48.6 mm(SNAP βy = 400 m)

LER Skew Sextupole(SK2: -1 to -6 m-2)
LER Orbit Correction
LER Optics Correction

LER D05V1 StudyHER Aperture StudyLER D05V1 StudyLER D05V1 StudyLER D05V1 StudyHER Vacuum Scrubbing
500 mALER Vacuum Scrubbing
400 mA

Injection Study
BT (p) StudyHER RF Kick (Momentum HER RF Kick
Acceptance, TBT BPM)

LER D05V1 StudyHER Vacuum Scrubbing
600 mALER Vacuum Scrubbing
550 mA32

2024

February
10(Sat)

C: OwlHER Vacuum Scrubbing
600 mALER Vacuum Scrubbing
550 mA

11(Sun)
HER Vacuum Scrubbing
600 mALER Vacuum Scrubbing
550 mA

12(Mon)
HER Vacuum Scrubbing
600 mALER Vacuum Scrubbing
550 mA

13(Tue)
HER Vacuum Scrubbing
600 mALER Vacuum Scrubbing
550 mAHER βy* = 81 → 8 mm
HER βy* = 8 → 3 mm
HER βy* = 3 → 2 mm
HER βy* = 2 → 1 mm

A: DayVacuum Scrubbing

Vacuum Scrubbing

14
(Wed)
HER Vacuum Scrubbing
6 mA
LER Vacuum Scrubbing
500 mAHER Optics Correction
HER Injection Tuning

15
(Thu)
HER Vacuum Scrubbing
50 mA
LER Vacuum Scrubbing
100 mALER BPM gain mapping
LER Quad BPM

16
(Fri)
LER Vacuum Scrubbing
200 mAHER RF D04A KLY
COLLECTOR WATER LEVELHER βy* = 1 → 8 mm
HER Quad BPM
LER Quad BPM

Vacuum Scrubbing
LER Quad BPM
HER Optics Correction

HER Injection Tuning
HER Optics Correction

LER Orbit Tuning
LER Optics Correction

HER Quad BPM

Find Collision Backet
HER Injection Tuning
HER BxB FB Tuning

B: Evening

Vacuum Scrubbing

Vacuum Scrubbing

HER Aperture Meas.
HER Kicker Tuning

Vacuum Scrubbing

HER Injection Tuning
HER Collimator Tuning

HER Injection Tuning
HER Collimator Tuning

HER 120 mA
HER RF Kick (Momentum
Acceptance, TBT BPM)

HER Kicker Calibration

HER RF D04A KLY
LER βy* = 48.6 → 8 mm COLLECTOR WATER LEVELHER Kicker Calibration

HER Orbit Correction

HER Optics Correction
Vacuum Scrubbing
HER 200 mA
LER 200 mA
33

2024

February
17(Sat)

C: OwlHER Vacuum Scrubbing
200 mALER Vacuum Scrubbing
200 mA

18(Sun)
HER Vacuum Scrubbing
500 mALER Vacuum Scrubbing
500 mA

19(Mon)
HER Vacuum Scrubbing
500 mALER Vacuum Scrubbing
500 mA

Horizontal Beam-BeamScan (RF Phase)

A: Day20(Tue)
HER Vacuum Scrubbing
HER 500 mA
LER Vacuum Scrubbing
LER 500 mA

BOR Calibration
Belle II diamond thres.

21
(Wed)
Test of Physics Run
HER 180 mA
LER 260 mA

Maintenance (regular)

LER Optics Measurement Physics Run
HER 180 mA
HER Ver. Aperture Meas. LER 290 mA

B: Evening
Collision Tuning

LER Injection Tolerance
Meas.

HER RF Kick

Restart of Operation

LER Injection Tolerance
Meas.

BCM / BxB FB Tuning
Collision Tuning
BPM Gain Mapping
Quad-BPM
Detuned → βy* = 8 mm

Start of Physics Run

Collision Tuning

23
(Fri)

RF D08E KPS WATERFLOWHER Vacuum Scrubbing
HER 500 mA
LER Vacuum Scrubbing
LER 300 mA

Bucket Selection Trigger
TuningHER Hor. Aperture Meas.
LER TBT BPM Tuning
LER Hor. Aperture Meas. LER Injection Tolerance
LER Injection Tolerance Meas.
Meas.

Vertical Beam-Beam
Scan

22
(Thu)

LER/HER
Orbit Correction
LER/HER
Optics Correction

ECL Online Lum. Trouble
Physics Run
HER 180 mA
LER 260 mA

Physics Run
HER 180 mA
LER 260 mA

Simple BOR Calibration
HER BOR Calibration

Physics Run
HER 360 mA
LER 450 mA
34

2024

February
24(Sat)

C: OwlPhysics Run
HER 360 mA
LER 450 mA
HER QFROE PS

25
(Sun)
Physics Run
HER 360 mA
LER 450 mA

26
(Mon)
Physics Run
HER 410 mA
LER 500 mA

March
27
(Tue)

Physics Run
LER 500 mA
HER 375 mA
HER SD3ORE PS Trouble
LER 470 mA
HER QFROE PSHER QFROE PS

Acoustic Sensor (D02V1)
Collision Tune Scan

A: Day13:57 LER Inj. Kicker
Accidental Fire
14:30 LER Inj. Kicker
Accidental Fire

Injection Tolerance
Meas. (HER)
HER Ver. Kicker StudyLER Collimator Study

B: Evening

Physics Run
HER 420 mA
LER 500 mA

LER Tune Shift Meas.

HER SD3ORE PS Trouble
LER 500 mA

Nikko Cooling Water
Pump (Magnet)

Linac KL3-4
Linac Machine StudyLER RF D07B (Detuned)
Magnet Initialization
LER IP KnobLER Z-Position(meas. +3.91 mm)
LER Optics Meas.

LER Collimator Study
Injection Tolerance
Meas. (HER)

28
(Wed)

HER Beam ON
HER Optics CheckHER TBT BPMs (Inj.)

29
(Thu)
Physics Run
HER 200 mA
LER 280 mA
5:00 LER Beam OFF

Physics Run
HER 250 mA
LER 350 mA

LER D07B KLY Exchange Injection Study(Bayesian Optimization)
HER Optics Studye- Linac/BT Studye- Linac/BT Study

13:30 Beam ON
LER D07B KLY Exchange Radiation Measurement
HER SD3ORE PS Trouble(LER D05V1)
LER βy* = 8 → 3 mm
HER Optics Studye- Linac/BT Study
HER Machine Studye- BT Study

HER βy* = 8 → 3 mm
LER/HER
Orbit Correction
Optics Correction

e- Linac/BT StudyLER Optics Study

Collision Tuning
Collision Tuning

1
(Fri)

Collision Tuning
Collimator Tuning

Physics Run
HER 200 mA
LER 280 mA

Collision Tuning

Physics Run
HER 400 mA
LER 500 mA
35

2024

March
2
(Sat)

C: Owl

A: DayPhysics Run
HER 380 mA
LER 520 mA
Collimator Tuning (LER)
MQLC3RP (Bad BPM)
Belle II CLAWS Abort

HER RF D04H PLC CPU

3(Sun)
Physics Run
HER 380 mA
LER 520 mA

4(Mon)
Physics Run
HER 380 mA
LER 520 mA

HER QFROE PS Trouble
BTe Energy FB Stop

RF VODL CONTROL

Chiller Trouble (OHO)
Tunnel Air Temp.

Radiation Measurement(Nuclear Regulatory
Agency)HER 380 mA
LER 520 mA< 5 µSV/hHER RF D04G TunePhase
LER RF D05A Coupler
Temp due to OHO Temp.

Linac Pulsed Magnet
cRIOs
Linac/BT StudyHER Aperture Mes.

Physics Run
HER 380 mA
LER 520 mA

B: Evening

5(Tue)
Physics Run
HER 380 mA
LER 520 mA
7:00 am Beam OFF
Belle II Investigation

6(Wed)
HER 60 mA
LER 150 mA
Linac/BT Study

7
(Thu)

8
(Fri)

Physics Run
HER 110 mA
LER 260 mA

Physics Run
HER 180 mA
LER 260 mA

Injection Study

Collimator Tuning

HER βy* = 3 → 2 mm
HER βy* = 2 → 1 mm

LER βy* = 3 → 2 mm
LER βy* = 2 → 1 mm

HER Orbit Correction

LER Orbit Correction

HER Optics Correction

LER Optics Correction

Injection Study

Collimator Tuning
Linac/BT Tuning

HER Optics Correction

LER Optics Correction

Collision Tuning

Collision Tuning

Collision Tuning

Physics Run
HER 180 mA
LER 260 mA

Physics Run
HER 250 mA
LER 360 mA

Belle II CLAWS Abort
Physics Run
HER 380 mA
LER 520 mA

Machine Tuning

36

2024

March
9
(Sat)

C: OwlPhysics Run
HER 300 mA
LER 400 mA

10
(Sun)
LER RF D08E Chiller
Water (Detuned)
4:01 LER Inj. Kicker
Accidental Fire
Reserver Voltage Adj.
RF VODL CONTROL

11
(Mon)

12
(Tue)
Physics Run
HER 300 mA
LER 400 mA

Physics Run
HER 300 mA
LER 400 mA
Oho Chiller/Water Pump LER RF D08E Chiller
TroubleWater (Detuned)

A: DayPhysics Run

Physics Run
HER 300 mA
LER 400 mA

Linac/BT Study

B: Evening

Physics Run

Beam-Beam Study

Linac/BT StudyLER RF D08CD Chiller
Down (Reset ON)

14
(Thu)

Physics Run
1:05, 2:55, 4:58 LER Inj.
Kicker Accidental Fire
Physics Run

15
(Fri)
Physics Run
HER 300 mA
LER 400 mA

maintenance (minimum)

Linac/BT StudyLER D08E Chiller Reset(D08E recovered)

13
(Wed)

Beam-Beam Study

Physics Run

Linac StudyLER RF D08CD Chiller
Replacement

Physics Run

Physics Run

Linac StudyLER RF D08CD Chiller
Replacement

Physics Run
HER 300 mA
LER 400 mA

LER Kicker Reserver
Voltage Adj.

Tsukuba Cooling Water
Adjustment

Linac/BT Study

Linac/BT StudyLER D05V1 Study

Linac/BT Tuning
Matching at 5 sector

Baking Run (2346)
LER 600 mA
HER 480 mA

Physics Run
Physics Run
HER 300 mA
LER 400 mA

Physics Run

Physics Run

LER D05V1 Study
Physics Run

Physics Run
HER 460 mA
LER 600 mA
37

2024

March
16
(Sat)

C: OwlPhysics Run
HER 480 mA
LER 600 mA
LER QN8OP MG NA IL
Nikko MG Cooling Water
Pump (3:54 - 4:00)

17
(Sun)
Physics Run
HER 480 mA
LER 600 mA
LER RF D05F Trouble

LER XRM Trouble

A: Day18(Mon)
Physics Run
HER 480 mA
LER 600 mA
HER QFROE_4 Trouble
Baking Run

Physics Run
HER 520 mA
LER 650 mA

HER Ver. EmittanceBlowup (Slow Drift)
LER Crab Waist ON

19
(Tue)
Physics Run
HER 300 mA
LER 400 mA

Physics Run
HER 480 mA
LER 600 mA
z-Position Adjustment

20
(Wed)
Physics Run
HER 480 mA
LER 600 mA

Physics Run
HER 520 mA
LER 650 mA

Physics Run
HER 520 mA
LER 650 mA

Baking Run
HER 560 mA
LER 700 mA
Physics Run
Earthquake
HER Optics Correction

14:00, 14:15 LER Inj.
Kicker Accidental Fire
(K1-3)LER Thyratron
Replacement

HER Crab Waist ON
Aperture Measurement

B: Evening

18:12 Belle II CLAWS
Abort

Chromaticity
Measurement

21
(Thu)

22
(Fri)
Physics Run
HER 560 mA
LER 700 mA

Baking Run
HER 600 mA
LER 750 mA
Tune Scan

LER RF D05A Trouble
LER Optics Correction

Beam-Beam Study

Physics Run

Physics Run
HER 520 mA
Injection Tolerance Meas LER 650 mA

Beam-Beam Study

Physics Run

Beam-Beam Study
Physics Run

Physics Run
HER 600 mA
LER 750 mA

HER Ver. Tune Scan
(43.582 to 43.587)
Physics Run
HER 300 mA
LER 400 mA

38

2024

March
23
(Sat)

C: Owl

A: DayPhysics Run
HER 600 mA
LER 750 mA

24
(Sun)
Physics Run
HER 600 mA
LER 750 mA

25
(Mon)

26
(Tue)

27
(Wed)

28
(Thu)

Physics Run
HER 600 mA
LER 750 mA

Physics Run
HER 640 mA
LER 800 mA

Physics Run
HER 680 mA
LER 850 mA

Physics Run

Baking Run
HER 640 mA
LER 800 mA
Physics Run

Baking Run
HER 680 mA
LER 850 mA
Physics Run

maintenance (regular)

HER βy* = 3 → 2 mm
HER βy* = 2 → 1 mm

MAC (9:00 - 17:35)

MAC (11:00 - 12:00)

MAC (9:00 - 16:40)

29
(Fri)
Physics Run
HER 640 mA
LER 800 mA

Physics Run
HER 680 mA
LER 850 mA

HER Orbit Correction
HER Optics Correction
LER βy* = 3 → 2 mm
LER βy* = 2 → 1 mm
LER Orbit Correction
LER Optics Correction

Restart of Operation
Physics Run

B: Evening

Physics Run

BPM Gain Mapping
Injection Tuning
Quad-BPM
Detuned → βy* = 8 mm
βy* = 8 → 3 mm
LER/HER
Orbit Correction
LER/HER
Optics Correction

Physics Run

Collision Tuning

Collision Tuning
39