Title: TRD chamber production
1DUBNA
TRD chamber production
- Box
- Pad plane panel
- 2 persons
- 2 gluing table
- 1 vacuum table
- Winding
- Wires transfer
- Gluing pad plane
- panel
- 2 persons
- 4 working places
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
2Time schedule of chamber production
day 1 2 3 4 5 6 7 8
work
box gluing
assembling and gluing side and front profiles ?
radiator gluing (outside) ? ? ?
radiator gluing (inside) x
PCB HV divider gluing x
PCB HV divider soldering x
HV cable gluing x
HV cable soldering and check flatness x
HV test x
padplane panel
preparation of padplanes ? x x x
back panel gluing (before friday) x x
cutting of padplane x x
check pad-cable contact x x
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
3Mechanical tolerance
- Some problem
- box
- Bending of L-profiles runs up to 1.2 mm
- Suitable value lt200 mkm ------ 100-150
mkm on glued box - Torsion of wacosit front profile unusable
- Radiator flatness sometimes is not good
especially on the corners - Position of ledge on L-profile does not
correspond to position of front - profile ledge
- We should check diameter of holes in front
profiles (use gas connector) - Remove surplus of glue from holes during gluing
of gas connectors into - front profile
- Pad plane panel
- We should check a quality of cable soldering to
the pads. - As a result 3 glued pad plane panels (from 18)
have a defect - (no contact between pads and outside
cable)
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
4PAD PLANES
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
5Clean rooms
Climate control Fan filter units
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
6Time schedule of chamber production
1 2 3 4 5 6 7 8 9 10 11 12
wires transferring
winding cathode wire planes ? ? x x
measurement of cathode wires tension on the winding frames ? x
transferring cathode wires x ? x
winding anode wires planes ? ?
soldering and cutting cathode wires, measurement tension ? ?
measurement of anode wires tension on the winding frame ? ?
transferring anode wires x ?
soldering anode wires, check break off wires, additional gluing x ?
cutting, measuring tension of anode wires x x
distance ledges gluing x ?
HV test on air x ?
prime glue into gap x ?
HV test on air with pad plane panel x ?
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
7Wire transferring
- 3 microscopes are used to define right wire
position relatively to reference hole - precision 50 mkm
- Special pins are used for anode wire transferring
- Head 10 mm diameter, 3.5 mm height, 20 mkm
precision - Chamber is fixed to a table
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
8Wires transferring
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
9Anode wire quality
glue
- Some anode wire has bad quality
- We have lost 1 chamber, and 1 bad chamber was
repaired ( dark current was gt500 nA when
chamber was tested on air under 1500 V anode
voltage) - Do not touch anode wire during the wires
soldering.
solder
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
10Wire tension
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
11Testing
- Gas mixture Ar/CO2
- 8 keV X-ray tube
- Movement X-ray tube by hand
- Measurement
- - dark current
- - dependence of anode current from HV
- - gain uniformity
- Anode current reads out to PC
- 3 cm pitch is used for gain uniformity
measurement
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
12Test results
Leakage current range 0-50 nA at 1500 V anode
voltage
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
13Test results
4 clamps was installed
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
14Test of L1C04 unglued chamberhomogeneity of
radiator, gain uniformity of chamber
Additional clamps were installed (along Z)
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
15Test results
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
16Test results pad plane panel is not glued to
chamber
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
17Test results
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
18Documentation
Mechanical tolerance
Chamber ?
test information
Cathode 75 ??? Cu-Be file name
_____________ Wire tension max min average
deviation Anode 20 ??? Au-W-Re file name
_____________ Wire tension? max min average
deviation
TRD status meeting, 3-5 January 2005, GSI
O.Fateev
19- Conclusions
- 13 chambers are ready and tested
- Gain uniformity 25-30
- 2 chambers (under transferring of anode planes)
- 4 boxes and 19 pad plane panels are ready
- Time which we intend to spend for 2 chambers
production is 8 days - For that we need to arrange 2 additional working
places (for gluing pad plane panel to chamber and
for testing) - We need to get the materials (before April) from
GSI/HD - - Front and side profiles
- - Pad planes
- - Gas connectors
TRD status meeting, 3-5 January 2005, GSI
O.Fateev