KEKB Shift Report

Date : 2007/11/28(Wed.)

Day Shift : Kamada(K);Tanaka, Aoyama, Watanabe(M);Hazumi (B)$&('($&"$"%#$&(*$(Plan) 0. Check LER bump for horizontal η' at IP
1. LER Beam Size minimization by Downhill Simplex
2. Luminosity optimization by Downhill Simplex
3. Try to avoid second abort of HER by increased
beam current at collision restartL  14.600 101033 cm-2s-1 L  L110.3 pb-1
  1620 850
Fill pattern  3.06spacing, 1trains, 1584+1 bunches
Aborts : LERonly : 0 / HERonly : 4 / Both : 1 1

Shift Summary

D5E

D5E
D5E

D10A

D11C,DD11E

Belle DAQ trouble2# ($# )""&+3

Tuning Items


H oﬀset, V angle
Simplex LER beam size minimization
LERHER
R1
0.63 -> 1.00
R2

4.79 -> 4.08

R3

1.19 -> 0.60

R4-0.50 -> -0.86

ηy*0.31 -> 0.58

ηy*'-0.07 -> -0.62

ηx*ηx*'4Knob 15Knob 26Knob 37

Comments
1. 2nd abort of HER was avoided by increased
beam current ~700mA and ~760mA atcollision start. The second case is lessfavorite for HER life but LER more stable.
2. Station phase adjust to reduce D5E load(Akai)

89Troubles
1. 10:50~14:15 Belle DAQ trouble
2. 11:55 HER abort, beam phase, ~848mA
D5E caused three aborts in 12 hrs., second
coming of the symptom that appeared twoyear ago and not understood. (Kageyama)
3. ~12:28 Belle ECL board replace
4. 15:09 HER abort, beam phase, ~837mA
D5E caused
5. 16:02 HER abort, beam phase (D11C ARC
DOOR KNOB, D11D ARC Coupler), LER
abort, crab.
10

D5E cavity voltage at the related
1. 01:26
11:54

02:30
15:08 15:39

11

Thoughts and Proposals etc.

12.-,13

KEKB Shift Report

Date : 2007/Nov/28(Wed)

Evening Shift : Suetake, Ieiri (K); Asai, Kawasumi (M); Tajima (B)$ %  # ! "Schedule:
1. Size-minimum simplex for LER
2. Size-minimum simplex for HER and the iteration
3. Luminosity-maximum simplexL  14.143 1033 cm-2s-1 L  L283.0 pb-1  712.9 pb-1
  1620 850
Fill pattern  3.06spacing, 1train, 1584+1 bunches
Aborts : LERonly : 0 / HERonly : 3 / Both : 01

Shift Summary

Crab
LMD10–1

BPM

LMD10–1

local run for Bellesimplex

2

Injection Summary3

Tuning Items

Set the best parameter of Knob1, according to sizeminimum simplex for LERHER H-tune +0.0005 for saving loss of pilot bunchTune vertical oﬀset, angle and horizontal oﬀset

Start size-minimum simplex for HER

4

Tuning Items

R1LERHER

R2R3R4ηy*ηy*'
ηx*ηx*'5

Knob 16

Knob 2

7

Knob 38

Comments
1. e+ Bunch-Loss at the leading part- except 1st bunch, related to tune, cloud?

ee+9 1.

17:32 HER Abort by Loss-Monitor D10-1- Before the abort, pilot bunch was lost and the lifetime wasvery short.

2.

20:46 HER/LER Synch set stop, BMP D07 delayed, ccc stop
- IOCBMD07 reboot, Orbit jump in a D07-region- not use the wrong BPMs
- VXI Main Flame #5 failure, need to replace3.

21:08 IOCBMD11B: 9 sec time lag

4.

21:48 ZHQA6RE (steering) time-out alarm5.

0:13 HER crab abort

6.

0:31 HER Abort by Loss-Monitor D10-1

7.

0:40 Y505 30%10

Suggestions and Proposals etc.
1. Table of tuning items would not benecessary.

11

('&12KEKB Shift Report

Date : 2007/11/29(Thu)Morning Shift : M. Satoh(K); Fuke, Shimodohmae(M); Katayama(B)    

1. Size-minimum simplex for HER
2. Luminosity-maximum simplexL  14.035 1033 cm-2s-1 L  
282.6 pb-1
  1620  850
Fill pattern  3.06 spacing, 1trains, 1584+1
bunches
Aborts : LERonly : 2 / HERonly : 1MA / Both : 11

Shift Summary
Size-minimum simplex for HER

AR injection

D7A/B CRB
Beam phase
D8-D ArcCoupler

2

Injection Summary3

Tuning Items
1. Size-minimum simplex for HER
LER
R1

HER
4.52 => 5.62

R2-6.09 => -5.61

R3-1.31=> -1.28

R4-3.57 => -3.41

ηy*1.24 => 0.12

ηy*'0.24 => 0.51

ηx*
ηx*'4

Knob 15Knob 2

6

Knob 3

7

Comments8

Troubles
1. 6:27 Abort both rings: Klystron D7-A/B
CRB Work

9Troubles
2. 7:36 Abort LER only
Beam Phase Abort

3. 7:42 Abort LER only
D8-D Arc Coupler CAV#1-AIR

10

Operationに関する感想、提案など

11,(&12