ROBOX modification plans
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Transcript of 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