HFT development

1
HFT development

• MimoStar2 based telescope

2
Outline

• Our goals
• Setup
• Current status
• Problems to solve
• What next

3
Our goals

• test functionality of a prototype MIMOSTAR2
  detector in the environment at STAR
• Charged particle environment near the interaction
  region in STAR.
• Performance of our cluster finding algorithm.
• Performance of the MIMOSTAR2 sensors.
• Functionality of our tested interfaces to the
  other STAR subsystems.
• Performance of our hardware / firmware as a
  system.
• The noise environment in the area in which we
  expect to put the final HFT.

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Telescope setup - components
MimoStar2 chips on kapton cables
DAUGHTER CARD
MOTHER BOARD
Control PC (Win)
STRATIX
Acquisition Server (Linux)
RORC SIU
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Telescope setup
3 MimoStar2 chips as TELESCOPE
Control, readout
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East Pole Tip installation
H. Wieman
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Current Status

• Electronics Hardware / Hardware All required
  PCBs, cables, computers, etc are in hand. We are
  currently working on some problems involving
  noise in our electronics setup. We hope to
  resolve this shortly and assemble and test the
  telescope setup in a beam run at the ALS at LBL
  before moving the system to BNL for the beam
  test.
• Firmware The required functionality required
  for the test has been implemented and tested in
  the ways possible before a working set of
  detectors is used.
• Integration The insertion tube and electronics
  box are in place at BNL as is the cooling system,
  DAQ and control PCs. Final assembly and testing
  of the telescope is required before we can do
  further testing.

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Problems to solve - distortions
In the configuration with a fully loaded kapton
cable we see some distortions which appear in the
middle of the frame
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Problems to solve - noise
IPHC results from Strasbourg Mezz. Full chip
bonded on a mezzanine card Mezz. Part chip
bonded on a mezzanine card with part of the bonds
(like for a flex cable) Flex1 only on flex
cable in the hft system Flex2 two chips in
parallel in the hft system

• The noise doesnt come from the DAQ system (1
  ADC)