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ScheduleCrab RF-driving System: Plane View
Crab: HER

Crab: LER

SCC; D10SCC; D11Nikko
Exp. Hall

78 m

SCC/ CrabHorizontal Test Area

RF- Power
2 Klystrons

D11 Kly. Gallery

RF- LL Cont.

D10 Kly. Gallery

Crab RF-driving System: Side View

RF- LL Cont.

Nikko
Exp. Hall78 m

D11 Kly. Gallery

6m

SCC; D11
Crab: LER

SCC; D10Crab: HER

Transport Crabhere.
10 mCrab RF-driving System: High Power Station: D11-EF: 2-Klystrons: ~1MW in total;-90kV/20A

Crab RF-driving System: Wave Guide at the tunnel

D10

D11upleroCt-Inpubar
To C

D10

Crab Installation: D10

Crab ; HER; D10pillar
HER LER

LER
HER

Input
Coupler

Narrow Passage
Crane : Low Lifting Height: Limited access
Install the Crab with using
the Tirroller. when theConcrete Shields areRemoved.
Installation Area is Near toNikko Exp. Hall

Crab Installation: D11

Crab ; LER; D11
Narrow Passage
Low Crane Lifting Height---> Interfere with SCC
HER LERLERHERCan use neither the Crane
nor the Tirroller;---> Need Carrying Tool.
Installation Area is far awayfrom the Nikko Exp. Hall;~ 60 m.

Crab Installation: How toNikko
Exp. Hall

Crab ; LER; D11~60 m

Set Crab to Carrier

Crab ; HER; D10

Set Crab to Tirroller

Removed 8 shieldCrane Rail

Crab Installation: Carrying Tool

The Carrier ; hanging to theexisting Crane Rail.
Moving along the rail andperpendicular to it.

Crab Installation: Carrying Tool

Move to the installation area, then hang down; using chain block(pulley).
Setting the Crab to the carrier;
Carried out on the Concrete Shield.

Crab Installation: Present Status: D10 Area
: Remove 8 Shields: Wave Guide can be seen

Wave guideShield

Crab Installation: Present Status: D10 Area
: Remove 8 Shields: Avoid Interference;Crab-base and cable rack
;Pipe(Mag/Beam) Rearrange

ShieldCrab Installation: Present Status: D10 Area
: Remove 8 Shields: Crab be set onTirroller

Crab Installation: Present Status: D11 Area
: Break the Wall

Crab Installation: Present Status: D11 Area
: Break the Wall
: Recover it whenrestart KEKB~60m

Crab Installation: Present Status: D11 Area
: Break the Wall
: On the Shield,
Crab will be set
to the carrier: Carrier will arriveat KEK 3/24

Crab Installation: Present Status: D11 Area
: Carrier will arriveat KEK 3/24
: Actual simulation
at 3/27~

Crab Installation: Present Status: D11 Area
: Far from Exp.Hall ; ~60m
: Remove Tables: Remove Both Beam Pipes (H/L): Avoid interference;
Crab-base and Cold Box;
cut/paste of one C-Box’s leg

Strategy / Schedule(0)3/1: KEKB shutdown, 5/1: Crab Start : almost bankrupt
Pair Crab Operation.
(1)Resume KEKB at May : Favorable
Continue effort to set up of Crab,and Preparations; Crab Control system, Carrying tool,
Area arranging...
Single Crab may be installed, if Horizontal Test is OK.
Can get valuable information; beam-Crab interaction, etc.
Feedback to improvement of Crab performance.
(2)Resume KEKB at April : Acceptable
Quit Preparation soon.
Recover the machine to be running.
Installation will be postponed until July / or..,without Feedback.

Strategy / Schedule ; cont.
(3)Both Crab Install; Resume KEKB at June?: Possible
Suppose, we take the scheme (1) and,At mid of April, IF first Crab show good performanceat H-Test, and IF second Crab can be available within
one month more.
Can test crabbing mode,and get many information for Improving the Crab.

Time Table of Crab installation(1) Crab Assembly ; ~3 weeks; if technical issues are settled.
(2) Horizontal Test ; 3 weeks (+ 2days); 1w(cool down) + 1w(test) + 1w(warm up)(+ High Power aging at room temp.)(3) Crab setting in the tunnel ; ~3-4days; if Area Preparations are finished.
(4) Piping/Cabling/Checking ; ~7-10 days
; after setting.
(5) Get Permission to operate ; 7-10 days
; (hope) reduce to couple of days(2-3 days).
(6) Cool down ; 1 week