# Presentation: 582179

## Slide 1

## General Progress

- Started general integration meetings for detector upgrades in the central region
- Ed O’Brien, the engineers (and detector reps.)
- Alternate weeks between mechanical and electrical issues
- Paul Giannotti (BNL) to work on VTX electrical issues
- Steve Boose (BNL) to handle HV/LV power supplies for VTX
- Custom system built in-house preferred
- CAEN HV/LV system specs for pixel detectors provided by Stony Brook folks

## VTX Spec Sheet

- Linked off PHENIX Silicon and Engineering pages

- “Parameter book” in TAC Review

## VTX Spec Sheet (cont)

- Lots of holes in this section

## 3D CAD Model at LANL

- Following slides summarize what is currently fairly firmly established for LANL to use as input for 3D CAD model.
- At least gets us up to and out of the outer support structure.

## Pixel Detectors

- Cable plant:
- 20 cm x 1.5 cm Al pixel bus (10 cm pigtail off the end of each half ladder) is wire-bonded to Al-Cu transition board.
- 3 cm x 3 cm x 8 mm encapsulated Al-Cu transition board is wire-bonded to Cu fan-out flex cable.
- Cu fan-out flex cable terminates with fine pitch multi-pin connector(s):
- Provides point of disconnect for assembly to SPIRO pilot module board.
- Considering multiple 3 cm x 8 mm x 8 mm connectors in a finger-like arrangement.
- SPIRO boards are mounted on endplates of the outer support structure.
- Beyond 10 cm x 10 cm SPIRO board, HV/LV on coax cables and signals on optical fibers.
- Cooling:
- 3 mm dia supply on one end of each ladder and 3 mm dia return off opposite end.

## Strip Detectors

- Cable plant (default option):
- Flex ribbon cable wire-bonded off the end of each ladder provides LVDS link between bus to RCC chips and multi-pin bulkhead connector on the outer support structure:
- Not wider than width of strip ladder and length to be determined by optimizing route in 3D CAD model.
- Provides point of disconnect for assembly of strip ladders onto barrel.
- Cooling:
- 3 mm dia supply on one end of each ladder and 3 mm dia return off opposite end.

## Mechanical Support Structure

- Modular design will allow mounting of VTX independent of NCC.
- Suspended from support rods cantilevered off CM
- One end on floating supports to compensate for motion during energization of magnet.

## Other Integration Issues

- Additional space necessary for VTX electronics may be provided by truncating corners of HBD to boundary of acceptance limits.
- Incumbent on VTX Group to prove this space is necessary
- HBD Group currently designing final support structure
- Temperature of pole tips from heat generated by energized magnet an issue?
- Are thermal shields for VTX necessary (as in PHOBOS)?
- A non-issue according to Hubert; little heat generated

## Status of Mech Engg

- Letter of intent from BNL to contract for engineering on VTX mechanics/integration at LANL in place
- _Not_ the same as the contract for HYTEC
- Past experience: contract takes ~ 4 mos. to set up
- HYTEC w/ Dave Lee provided contract draft to BNL
- Specifies scope of work based on original cost matrix
- Defines deliverables as finished parts (not just drawings)
- Meeting in NM w/ HYTEC scheduled for June 16

## HYTEC Cost Matrix

**+ 15**

**+ 20**

**R&D 200(?)**

**DOE Proposal**

## Status of Mech Engg (cont)

- Walt Sondheim to present recent update from 3D CAD model
- Don Lynch to present results on spatial envelopes for proposed detector upgrades in central region