KEKB Shift Report

Date : 2007/12/3(Mon)Day Shift : Suwada (K); Tanaka, Noguchi, Asai (M); Nozaki(B)Simplex downhill scan continued & MS
Planned menues
1. Downhill-simplex scan
2. MS: Demonstration of a100-bunch ﬁll patternL  13.586 1033 cm-2s-1 L  L237.2 pb-1  - pb-1
  1620 850
Fill pattern  3.06 spacing, 1 trains, 1584+1 bunches
Aborts : LERonly : 0 / HERonly : 0 / Both : 01

Shift Summary

PF inj. AR inj.

PF inj.

AR inj.

Downhill simplex

MS

Stop downhill simplex,
and the knob R2 of HER wasback to its starting
value manually2 Day shift3 


iBump (collision orbit adjustments, vertical oﬀset/angle)

R1
R2
R3
R4
y*
y*'
x*
x*'

LERHER

4

Knob 15

Knob 2

6

Knob 37

Troubles
14:35 Alarm: LER Septum Right Temp.

8

Comments or opinions on operations
1.

The present downhill simplex is frequently trapped around a local
minimum in luminosity. It seems that this method needs moretrainings.

Stop downhill simplex,
and the knob R2 of HER wasback to its starting
value manually—>The luminosity started to recover.

9 10KEKB Shift Report

Date : 2007/12/3(Mon)

Evening Shift :Egawa,Tobiyama (K) M.Tanaka,Fuke(M) Tamai(B)       
Plans
1. Few bunch collision (until 21:30)
2. Resume to normal collision ( 21:30 ~ )L$! 13.624 1033 cm-2s-1 ~91!"% #~100$L &L  pb-1  610.6 pb-1
%"" $ 1620 850
Fill pattern 49 spacing, 1 trains, 99+1 bunches
Fill pattern 3.06 spacing, 1 trains, 1585+1 bunches
Aborts : LERonly : 0 / HERonly : 2 / Both : 01

Shift Summary
D11F_CCG

D11F_break down

pf_injpf_injAR_injluminosity simplex for 99+1 bunches

HER ScaniBump Voffset

2

Injection Summary3

Tuning Items
high current ( normal ) → few bunches ( 99+1)
LERHER
R1
0.18 5.00 → 5.36
0.36
0.34 →0.52
R2

5.65 → 5.19

-0.46-4.26 → -4.48-0.22R3-0.19 → -0.08

0.11-1.86 → -1.73

0.13

R4-1.70 → -0.39

1.31-0.02 → 0.36

0.38

ηy*

0.30 → 0.46

0.16

0.63 → 0.84

0.21

ηy*'

0.12 → -0.23-0.35-0.96 → -1.01

-0.05

ηx*
ηx*'
R2@Cra4

Tuning Items

R1LER

HER*
10.72→10.72

R2-14.933→-13.0

R3-1.73→-0.7

R4

0.72→0ηy*

1.68→1.5

ηy*'
ηx*
ηx*'
R2@Crab5

100 bunches : simplex

G reachs 100% at the best knob.

6Knob 17

Knob 28

Knob 39

Comments10Troubles
1. HER crab D11F break down(18:15)

2. ZHQC3LP range out alarm (frequently)
3. ZHQC5LP range out alarm (frequently)

4. HER Abort RF D11-F(CRAB) ̲CCG (Abort) (21:54)
5. OPCCR : too many sockets alarm (22:39)
 Backed to the normal state without anyaction.

11

Operationに関する感想、提案など

12

+'%
13

KEKB Shift Report

Date : 2007/12/04(Tues.)

Morning Shift : Mimashi(K); Watanabe, Aoyama(M); Haba(B);      To do list
1. knob scanL  13.818 1033 cm-2s-1 L  L341.7 pb-1  ! pb-1
  1620 850(840)
Fill pattern  3.06 spacing, 1 trains, 1584+1 bunches
Aborts : LERonly : 0 / HERonly : 0 / Both : 01

Shift Summary

PFPFPF ARPF2

Injection Summary3

Tuning Items


Tune,IP knob,Waist,ibump
LER

HER

R1

0.52->0.52

5.36->5.36

R2

5.19->5.19-3.9->-3.9

R3-0.08->-0.08-0.7->-0.7

R4-0.39->-0.39

0.0 -> 0.0

ηy*0.46->0.46

0.75 -> 0.75

ηy*'-0.23->-0.23-0.01 -> -0.51

Waist-0.2->-0.2

0->-1

νx+0.005-0.002

νy-0.0058+0.0013

Hoﬀset0.673->0.673
4Knob 15

Knob 2

6

Knob 3

7

Comments
1. PF Injection (1:22, 3:10, 6:36, 8:00)
2. AR Injection (7:00)
3. More LER Current may give more
Luminosity ?

8Current Ratio

9Troubles
1. 4:24 ZHQC5LP̲1 Rejected (Range Out)
Alarm -> disappered soon.
2. 8:10 ZHQEAE̲43 Set Failed (Time Out)1011