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Pavia 25/11/2003Davide Piccolo INFN Napoli Status of assembling and Chamber results at HT Pavia 25/11/2003 Davide Piccolo.

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Presentation on theme: "Pavia 25/11/2003Davide Piccolo INFN Napoli Status of assembling and Chamber results at HT Pavia 25/11/2003 Davide Piccolo."— Presentation transcript:

1 Pavia 25/11/2003Davide Piccolo INFN Napoli Status of assembling and Chamber results at HT Pavia 25/11/2003 Davide Piccolo

2 Pavia 25/11/2003Davide Piccolo INFN Napoli outlook Status of the assembling operation at HT Tests at HT Summary of the results Problems and peculiarities

3 Pavia 25/11/2003Davide Piccolo INFN Napoli HT chambers location HT Bari Pavia CERN 11 chambers 4 chambers back 3 chambers 8 chambers 8 chambers ready 30 chambers produced 12 chambers at HT (9 ready, 3 to be checked) 3 chambers at CERN (no cosmic test) 7 chambers at PAVIA (tested ok) 8 chambers at Bari (ready to be tested)

4 Pavia 25/11/2003Davide Piccolo INFN Napoli

5 Pavia 25/11/2003Davide Piccolo INFN Napoli Tests at HT Continuity test: strip continuity check LV test Gas test Cooling test HV scan: I vs HV Stability test: monitor of dark current at 9500 Volts for one hour Test of single rate strip by strip Threshold test Tests during assembling Tests after assembling

6 Pavia 25/11/2003Davide Piccolo INFN Napoli HV scan

7 Pavia 25/11/2003Davide Piccolo INFN Napoli Stability test

8 Pavia 25/11/2003Davide Piccolo INFN Napoli Analysis program under development Convert the HT data format in the standard CMS RPC DataBase format. Measure average and RMS of the dark current for every HV step In the future will include single rate measurement analysis

9 Pavia 25/11/2003Davide Piccolo INFN Napoli Average dark current vs HV RMS dark current vs HV

10 Pavia 25/11/2003Davide Piccolo INFN Napoli SUMMARY RESULTS

11 Pavia 25/11/2003Davide Piccolo INFN Napoli Chamber 179 (double gap replaced) Discharges On frame HV = 9500 V.

12 Pavia 25/11/2003Davide Piccolo INFN Napoli Noise rate tests Fast test single rate vs FEB threshold, with manual frequencymeter. Depending from enviromental conditions, noise rate very high or reasonable Prototype of 288 channels frequencymeter ready. Very soon will be tested on chamber and included in HT test procedures.

13 Pavia 25/11/2003Davide Piccolo INFN Napoli Main problems Smd resistor broken on kapton (about 3 strips per bigap). Better situation for new bigaps. One cable broken after transportation to Bari (storage bars) For 3 chambers replaced a double gap (possible Extracosts at HT !) –Chamber 39 replaced backward bigap –Chamber 33 replaced backward bigap –Chamber 179 replaced backward bigap

14 Pavia 25/11/2003Davide Piccolo INFN Napoli Future plans 8 chambers ready to be sent to Pavia 21 double gaps at HT 8 chambers can be assembled 5 slots available for storage Need trolleys for storage We plan to produce at least more chambers by the end of the year


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