Transcript Norfolk State and LHC

X-ray Survey System
for Barrel TRT Modules
K. McFarlane
Hampton University
DOE/NSF Review, 20-Mar to 22-Mar
2001
Summary
• Purpose: gain and wire-position surveys on
completed barrel TRT modules.
• Requirements
• Status
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
2
Requirements
• Gain to 2% at at least 14 points on every
straw
• XY position to 0.05 mm at 4 points on
many straws
• Z position to 1 mm
• Complete all modules by April 2003; this
means slightly more than one per week,
with a start in June 2001.
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
3
‘Prototype’ is Duke System
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
4
X-ray survey system (XRSS)
• Micro-focus 80kV tube
• XY linear motions with resolution of
0.01mm in X and 0.2mm in Z
• GasSiplex front-end chips
• Cross-point switch, amplifiers and multichannel analyzer DAQ
• PC-based readout and control
• Analysis by paw or ROOT
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
5
Schematic
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
6
XRSS Status Summary
Subsystem
Safety, H&E
Design Components Assembly
Yes
In hand
Laboratory
Yes
X-ray Source Yes
Mechanics
Yes
New HVAC
80%
70%
Gas System
HV System
Slow Control
Electronics
Yes
Yes
Yes
80%
In hand
In hand
In hand
Database
Analysis
50%
25%
Software
Software
7/17/2015
BNL0103XRSSSumry
Critical in hand
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
Test
80%
70%
60%
20%
20%
7
Safety, H&E
• X-rays (60W at 80 kV)
• Source, if used (55Fe)
• High voltage (up to 2.5 kV on module, 80
kV on X-ray)
• Compressed gases
• Inert gases (ODH)
• Industrial (moving parts)
• Laser (alignment).
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
8
Laboratory
• Two rooms (15’x18’) are being set up for
this task
• Main issue left is HVAC: for safety as well
as control we need a separate system; we
are negotiating with HU administration.
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
9
X-ray Source
• X-ray tube, power supply, controller, and
cooler on hand
• 80 kV, 60W micro-focus tube with <50 mm
spot, continuous with <1% stability
• Collimator is on order
• Shield box is in detailed drawing for
manufacture.
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
10
Mechanics -- Summary
• Framework assembled
• Linear motions assembled, aligned to
required tolerances and tested.
• Module mount to be detailed for
manufacture.
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
11
Mechanics – Frame
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
12
Mechanics -- Motion
Stepper motors; controlled by
National Instruments motion
controller and LabView.
Components in hand and
exercised with 56 lbs on
stage – does not lose steps.
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
13
Gas System -- Basic
Schematic
Controller
ODH
GPIB
Channel 1
PT
Channel 2
Module
Channel 3
Channel 4
Each channel: cylinder, regulator, manual valve, flow controller.
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
14
Features
• Oxygen and CO2 levels in room monitored
• System allows mixing of three components,
to about 2% accuracy on each component
• Can use pre-mix
• Flow rate envisaged is up to 2 vols/h for
above precision (baseline is 1 vol/h)
• Active gas can be re-circulated through
module.
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
15
Equipment selection
• Industrial ODH monitors (oxygen and
carbon dioxide levels)
• High-purity or UHP gases and components
• Wetted parts are stainless steel, nylon,
Viton, Kel-F, brass, nickel, chrome
• No grease of any kind
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
16
Gas System Issues
• How leak-tight is the radiator volume?
• Is the 70/20/10 Ar/CO2/CF4 the correct mix
for gain tests for barrel modules?
• What gas should be used for flushing the
radiator volume? CO2 as in the TRT? An
Ar/CO2 mix? The gas from the module?
• Can a different (cheaper?) gas be used for
wire position surveys? (contd.)
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
17
HV System
• Based in Bertan MWPC supplies, using
remote control and monitor features
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
18
Slow Control
• Based on National Instruments software and
hardware
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
19
Electronics
• SBA: Stamp Board Adapter
• GPX: Gassiplex FE board (chips on hand)
• CSX: Cross-point switch based on AD8110
(evaluation underway – exceeds
requirements)
• Amplifier – In hand, tested
• Histogramming ADCs in hand and tested
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
20
ADCs
• 40 MHz capability
• LabView support from vendor
• Tested and used
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
21
Database and Analysis
• To be done
• Baseline for raw data is flat spectrum files
on disk, in a structured set of folders with
(long) names indicating conditions
• Base line for analysis is PawNT
• Work to be done!
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
22
Module Test Issues
• What is Hampton’s responsibility?
– HV aging done at Duke/IU
– Basic testing (and repair) done at Duke/IU
• On gain survey, how many points are
needed (plan is for 14 per straw)?
• On wire position (relative to mounting
pins), how many wires (4 places per wire)?
• Should Hampton plan to do tension testing?
Wire
replacement?
ATLAS Barrel TRT Meeting
7/17/2015
23
BNL0103XRSSSumry
BNL, 20-Mar to 22-Mar 2001
Current status
• All components on hand or on order, except
bulk CF4. Pre-mix Ar/CO2/CF4 on hand.
• Gas system is to be assembled and tested
7/17/2015
BNL0103XRSSSumry
ATLAS Barrel TRT Meeting
BNL, 20-Mar to 22-Mar 2001
24