1. ROBOX modification plans
HF ECR follow up Nov 29,2010
Ianos Schmidt

2. 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
Validate/update CAD of box components
Produce a new plate 2
Plate 3 design
Sleeve/optical
Coupling design
Produce proto plate 3
Try 2?
Design parts for PPP
Try 2?
PPP
Testing
Electrical
optical
Test beam?
Magnet field test
Plate 2 decision
Modify / produce from scratch
Make from scratch
P5 modification/assembly
Produce parts
Installation / commissioning

3. Replaces eight lowest eta PMT’s with Hamamatsu R7600U-200-M4 PMT’s
Slice test readout box
Replaces eight lowest eta PMT’s with Hamamatsu R7600U-200-M4 PMT’s
Existing “plate 2”
Existing PMT shields
For 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

4. Slice box assembly cross-section for R7600U PMT’s
Shield
Ground strap
Base board
Plate II
PMT
Kapton
insulator
“Iron” shield
~17mm
PMT to light guide
Optical coupling
(“sleeve”)
Plate I
Light guide
mirror
Light guide assembly
(part of wedge)

5. R7600U PMT’s and base board

6. Slice test box with new shields and base board

7. Box tested in BAT904 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
TESTS:
Laser/LED
Channel mapping verification
HV mapping
Gain/single PE
CAEN HV supply test
HV cable adapter test
Pedestal and light tightness
HF ROB test unit
Simulates calibration light distribution of HF wedge
* Big thanks to Halil Saka for his work in 904

8. 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

9. Slice box installed on HF+ IPHI 67

10. HF+ IPHI 3 light guide mirrors replaced
AFTER
BEFORE

11. Sleeves in IPHI 3, IETA 29 TEFLON Mirror TYVEK
“Telescopic” Sleeve made of
3M radiant mirror film (“HEM”).
Non conductive.
TEFLON
IETA 29S
Mirror
Light guide tube
TYVEK
IETA 29L
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.

12. 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

13. Single PMT mock up 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 …)
HF “backplane”
Plate 1
Plate 2
Shield
Light guide
Mirror & sleeve

14. Single PMT mockup

15. 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.

16. 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^2
Storage at needed at P5 10m^2
Cable prep area (CERN) 14m^2
TOTAL 48m^2