1

Recap Clamp Installation

RIKEN/RBRCItaru Nakagawa

Clamp Schedule3 4 5 6 7 8 9 10 11

40 clamps production40 clamps Install 6/15Humidity Test @ test benchDesign Review 5/16 Basically OK, except for a few homework

Humidity test @ 1008Procurement BidProduction

Partial Delivery

QAInstall

Delivered to BNL

@RIKEN @BNL

2

3

Octant-7 Clamp Status

Octant 7

37103710

37103711

37113711

37123712

37133713

1-pin type 1A

1B

The dry air cover installed to here 1B

4

Octant-8 Clamp Status

Octant 8

38103810

38103811

38113811

38123812

38133813

Conductive Rubber Type

4-pin type

1B

2A2B

1A

1B

2A

5

Design Number of ClampsRubber Type 34-pins 31-pin 31-pin Old Design 281-pin New Design 8

Pre-installed

Idendical

6

38143814

38143815

38153815

38163816

38173817

40 Clamps Install(north St-3, oct7&oct8)

Octant 8

38103810

38103811

38113811

38123812

38133813

Max 20 clamps /gap

37143714

37143715

37153715

37163716

37173717

Octant 7

37103710

37103711

37113711

37123712

37133713

To be installed during nextmaintenance day on June 15to bottom region of Oct-7&8.

Old Design x 10

Old

Des

ign

x 11

Dry Air Coverx 8

Old Design x 10New

Des

ign

x 84p

in x

3

1A 1B 2A 2B

7

Dry Air Cover

Octant 7

37103710

37103711

37113711

37123712

37133713

Manifold -> Requested to Carter

10 additional dry air covers to be installed

Flow rate100ccm/clamp?

8

40 Clamps Install Man Power

Sanghwa, Kiyoshi@BNL

Itaru@BNLYoshimitsu@BNL

Maintenance Day

clamp Install

Hideyuki@BNL

Yoshimitsu@BNL~7/5

Sanghwa Park (SNU)

Yoshimitsu Imazu Yoshimitsu will stay in BNL until the end of Run11 just in case.

9

6/15 Access Day Install• Work plan is discussed in DC (June 8).• Itaru, Yoshimitu, Sangwha, and Hideyuki will work on install.

(All confined space trained)• Requested 8 hours access to CAD via Takao (RC).• Work permit, confined space survey are arranged. (Don Lynch).• Install as many as possible clamps up to 40 clamps.• Need to monitor stable condition for 1~2 hours after

completion of the installation until the hall close. • Successful contact rate, drawing current w/ HV will be closely

monitored during/after installation.• A new AC readout clamp is to be tested w/ anode calibration

pulse and a pulser input from the center cathode cable.

Installation Procedure (1)1. Take HV current snapshot.2. Remove Preinstalled

Clamps from Gap-0.3. Install new clamps to Gap-

1.4. Install clamps to Gap-0.

Oct-8

Oct-7

11

Installation Procedure (2)1. Inspect target anode pads and record

damaged/missing pad channels. 2. Apply conformal coating.3. Plug-in V-readout pins to a clamp.4. Mount the clamp.5. Record V-readouts. Try unscrew and

screw if contact is fragile.6. Remove V readout pins.7. Ramp up HV every 2 clamps install and

check drawing current.8. (Mount dry air cover)

12

Recording ContactsDamaged/missing pad

Damaged/missing resister

13

Material ReadinessQuantity Status

Pig Tail

2M Terminals 40 Mounted by default

2M Screws 100 Provided by F. Toldo

GND Holder 40 x 2 Manufactured by F. Toldo

Hex screwwrench

Regular 5 Delivered

Torque 1 To be delivered to RIKEN

Dry Air Cover

Manifold 1 AvailableAdupter 10 Ordered by Carter

AC Readout

New Board 1 DeliveredReadout cable 50

(long+short)Delivered

Pocket pulser 2 Delivered to RBRC

Cathode cable adupter

1 Custom made by Yoshimitsu

Oscilloscope 1 Available in 1008Inspection Fiber Scope 1 In test bench

Conformal coating+brush

14

Preparation

• Assemble GND Holders• Make/repair V readout

boards– 2 boards w/ long pins✔– 1 board w/ short pins ✔

(for AC readout)

6/13 ~ 14 @ 1008

15

AC ReadoutHV side

GND side

HV side

GND side

DC Voltage Readout

AC Voltage ReadoutOne AC readout clamp will be available for test on June 15th.