KEKB Shift Report

Date : 2007/11/30(Fri)Day Shift : Ogawa, Funakoshi, Koiso, Iida...(K); Ohkubo, Noguchi,Watanabe, Toyotomi(M); Hara(B)    
To-do list
1. Horizontal scan○
iBump vertical position/angle scan○
2. Downhill simplex△L  12.332 1033 cm-2s-1 
L182.0 pb-1
  1620 850
Fill pattern  3.06 spacing, 1trains, 1584+1 bunches
Aborts : LERonly : 0 / HERonly : 0 / Both : 1?
1

Shift Summary
Linac Dm-inj server
stoppedLER Crab aging

HorizontalscanLocal run

AR injection

ibump v-offset adjusted

Downhill simplex
started2

Injection Summary3Tuning Items

Horizontal oﬀset, iBump v-position/angle



Waist for both ringsLuminosity maximum downhill simplex

4Knob 15

Knob 2

6

Knob 3

7

Comments8 1. 12:47 Both rings aborted.
LER Crab could not be recovered.
=> Morita (Crab shift) did aging for anhour to recover. Gas absorption
conﬁguration change due to slighttemperature rise* yesterday may
be the reason for aging. (Morita)* Aging was carried out also on themaintenance day.
2. 15:24 Water leakage at QCS compressor(Ono)=> Quick ﬁx done.
9Operationに関する感想、提案など

10,(&11KEKB Shift Report

Date : 2007/11/30(Fri.)Evening Shift : Ebihara, Nishiwaki, Koiso (K); Asai, Kawasumi (M);   

To-Do list
1. Simplex Knob Scan in Luminosity Maximize modeL 13.213 1033 cm-2s-1 L  !L 298.2 pb-1  696.8 pb-1
  1620 850
Fill pattern

3.06spacing, 1 trains, 1584+1 bunchesEarthquake
Aborts : LERonly : 0 / HERonly : 0 / Both:1
1

Earthquake ARDownhill Simplex

iBumpInitialization Simplex ScanSet Best Knob2

Injection Summary3

Tuning Items


Simplex Scan in Luminosity maximize mode

LER H-Tune +0.0020 -> -0.0020 (Δ±0)
To ﬁll ﬁrst 100 bunches. Those couldn't be ﬁlled due to abad knob set in simplex scan.

Setting the initial values

4

Tuning Items

Set the best knob

iBump V-oﬀset, angle

HER waist5Knob 16Knob 2

7Knob 3

8Comments
1. LER and HER H-tune values in IPknob
panel were "0" from yesterday evening.
They returned to correct values when thetunes were changed.
11/30 20:20

11/29 17:00~25:00

9Troubles
1. 18:32 LER/HER Abort (Earthquake) In Tsukuba, intensity 2 in Japaneseoriginal scale.

10

Operationに関する感想、提案など

11

+'%
12

KEKB Shift Report

Date : 2007/12/01(Sat.)

Morning Shift : Kageyama (K); Aoyama, Shimodomae (M); Higuchi (B)+1 '))-" 0& "# - #( -" %(Plans● Avoid aggressive machine tuning.
● Keep the machine condition stable.

L 1.3482 1034 cm-2s-1 L   L pb-1  ***.* pb-1
  1.62  0.85
Fill pattern  3.06 spacing, 1 train, 1584+1
bunches
Aborts : LERonly : 0 / HERonly : 0 / Both : 01

Shift Summary

HER Waist LER Waist

HER ηxHER η'x

LER ηxLER η’x

2

Injection Summary3

Tuning Items
HER Waist: -1.0 → -0.6

LER Waist: -0.4 → -0.4

HER ηx @IP: 0.0 → 0.0

HER ηʼx @IP: 0.0 → 0.0

LER ηx @IP: 0.0 → 12.0LER ηʼx @IP: 0.0 →4Knob 15

Knob 2

6

Knob 3

7

HER Waist Scan
The HER beam size response was unusual. It was dependent on

8

LER Waist Scan
Also during LER Waist Scan,

9

HER ḧx @IP

10HER ḧ’x @IP

11

LER ḧx @IP

12Troubles
None

13

ARES Cavity Fault Stats (2007.10.02 ~ 2007.11.30)
KEKB operation JFY2007Q3 started.

One Fault in LER

One Fault in HERKEKB Review Day 1LERHER# of Cavities

Fault Rate (Oct.) /cavity/day

Fault Rate(Nov.) /cavity/day20
120.0067
00.013
0.031

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KeKB
A Gate into the High-Luminosity Frontier

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KeKB Episodes (Season 1 from 1998 to 2008)
101 Runway 34L
102 Airborne
103 Heat Wave
104 Radio Silence
105 Spiral Summer
106 Out of Clouds
107 Tally Ho
108 The Ceiling
109 Check Your Six
110 Lost Contact
111 Cross Wind112 Decision Height
KeKB Episodes (Season 2 from 2012?)
201 Wave Off
202...

15

Operationに関する感想、提案など

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>9717