robox modification plans

ROBOX modification plans

HF ECR follow up Nov 29,2010

Ianos Schmidt

Design plan

Optical/mechanical mock up• Test light guide coupling• Test sleeve performance• Test PMT shielding, support, grounding, noise…

• Validate/update CAD of box components• Produce a new plate 2

Design parts for PPPTry 2?

Define cabling interfaces

Plate 3 design

Produce proto plate 3

Try 2?

Produce parts

Testing• Electrical• optical• Test beam?• Magnet field test

Plate 2 decisionModify / produce from scratch

P5 modification/assembly

Installation / commissioning

PPP

Sleeve material selection

Sleeve/opticalCoupling design

Slice test box

Make from scratch

Slice test readout box

Existing “plate 2”

Existing PMT shieldsFor 16 standard HF PMT’s

Base board for new PMT’s:• Conventional resistive bases• provides“Reference” signals for QIE• Ground connections to shields• Safety ground

“Mini Plate 2”

New PMT shields

Replaces eight lowest eta PMT’s with Hamamatsu R7600U-200-M4 PMT’s

Slice box assembly cross-section for R7600U PMT’s

PMT

Plate II

Base board

ShieldGround strap

“Iron” shield

Plate I

Kaptoninsulator

PMT to light guideOptical coupling(“sleeve”)

~17mm

Light guide assembly(part of wedge)

Light guidemirror

R7600U PMT’s and base board

Slice test box with new shields and base board

Box tested in BAT904

TESTS:• Laser/LED• Channel mapping verification• HV mapping• Gain/single PE• CAEN HV supply test• HV cable adapter test• Pedestal and light tightness

Test setup:• Slice box• HF front end crate + Calibration Unit• HF LASER/LED light distribution fibers and CLI • HF front end cables• HF HV supply + CAEN supply• HV adapter cable, later installed in USC

HF ROB test unitSimulates calibration light distribution of HF wedge* Big thanks to Halil Saka for his work in 904

Location of new PMT’s

IPHI 67

Covered PMT(IETA 29, short)

New PMT’s are located on HF+ at IPHI 67 and cover towers IETA 29 to IETA 32

Slice box installed on HF+ IPHI 67

HF+ IPHI 3 light guide mirrors replaced

BEFORE AFTER

Sleeves in IPHI 3, IETA 29

IETA 29S

IETA 29L

TEFLON

TYVEKLight guide tube

Mirror

“Telescopic” Sleeve made of3M radiant mirror film (“HEM”).Non conductive.

In HF+ IPHI 3 all mirrors were replaced with standard “German Mylar”. HEM sleeves were installed everywhere except IETA 29S and IETA 29L which have Teflon and Tyvec sleeves respectively.

Single PMT mock up.Mechanically and Optically identical to a single channel of a HF ROB.For study of PMT insulation, support, shielding, electrical and optical coupling.

Ianos Schmidt. Oct. 11,2010

Single PMT mock up

HF “backplane”

Light guide

Mirror & sleeve

Plate 1

Shield

Plate 2

Three sets of components were produced.• One for Iowa lab for sleeve design and testing• One for Mechanical design evaluation• One for testing at CERN (Sources, testbeam …)

Single PMT mockup

Box design• Design of new box components started. Initial pass on mechanical features effecting base board design was provided to Sergey for prototype production.

• Some concerns about the strength of grade XX Garolite for plate 2’s. - No longet entertain possibility to modify existing plate 2’s.

Work space estimates at CERN

Box assembly area ~12m^2 (P5)Box test area ~12m^2 (P5)Box storage area ~5m^2 (P5)Cable prep area ~14m^2 (at CERN)Cable storage ~5m^2 (P5)

Workspace needed at P5 24m^2Storage at needed at P5 10m^2Cable prep area (CERN) 14m^2TOTAL 48m^2