robox modification plans
DESCRIPTION
ROBOX modification plans. HF ECR follow up Nov 29,2010. Ianos Schmidt. Design plan. Slice test box. Sleeve material selection. Optical/mechanical mock up Test light guide coupling Test sleeve performance Test PMT shielding, support, grounding, noise…. Define cabling interfaces. - PowerPoint PPT PresentationTRANSCRIPT
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ROBOX modification plans
HF ECR follow up Nov 29,2010
Ianos Schmidt
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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
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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
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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
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R7600U PMT’s and base board
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Slice test box with new shields and base board
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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
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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
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Slice box installed on HF+ IPHI 67
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HF+ IPHI 3 light guide mirrors replaced
BEFORE AFTER
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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.
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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
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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 …)
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Single PMT mockup
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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.
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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