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ALICE TPC field cage status Sardinia May 2004 Michael Hoch Cern-TA2.

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Presentation on theme: "ALICE TPC field cage status Sardinia May 2004 Michael Hoch Cern-TA2."— Presentation transcript:

1 ALICE TPC field cage status Sardinia May 2004 Michael Hoch Cern-TA2

2 Field Cage Feb. 04 Strips on the muon side completed

3 Temperature sensors inside the volume 4-wire Pt 1000 sensors purchased –50 pieces with 1m wire Calibrated to two calibr. reference pt1000 –(±3mK at 20 degree) –Calibration range between ~7- 25 degree –Residuals fit by Danilo -> ±10mK

4 Shaft side temperature sensors Glued on to the skirt of the 18 sectors

5 Muon side temperature sensors 4 sensors at the inner cylinder

6 Shaft side connectors and feed- troughs Pt 1000 Skirt supply Last resistors guard ring chains Last resistors R-rods Last strip supply

7 Electrical connections inside

8 Map of all connections on the endplate

9 Field Cage March 04 Once more HV test (1500V between strips) & cleaned -Muon side completed-

10 Displacement rails mounted turning clamp

11 Field cage turn over

12

13 Resistor rod RR final assembly

14 Resistor selection Resistor dispersion results in a field distortion of maximal 40  m (presented by Danilo; status field cageFeb. 04)

15 Resistor Rods shaft side

16 << Resistor Rod outlet on the endplate Resistor Rods shaft side Hooks on the outlet side >>

17 Resistor rod shaft side HV tests 1500V between hooks 15kV between Al-guard rings 120kV in the test box

18 Resistor rod shaft side HV tests

19 Rod installation

20 Laser system control Laser beam mapping by Borge Cross checked by Rainer

21 central membrane 0.8mm wire connecting the outer and inner CE-flange Conductive glue -> CE-flange-Al-Mylar foil

22 Potential strips shaft side

23 visit from GSI

24 Shaft side strips finished

25 I-bar survey system tests

26 I-bar survey: BCAM system test Bicam system tests with Panos Christakoglou

27 Outlook: Installation of 18 pt1000 inside the volume Electrical connection/ feed troughs Test HV: – 1500V between each strip –120kV Cleaning of the volume Installation of external temperature sensors Turning of the field cage, closure of the volume He & final integral leak test Installation of the charge to the sliding feeds

28 Thank you for your attention TPC meeting Sardinia May 2004 Michael Hoch CERN TA2


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