	<i>Test Results for Chamber M3R4-32</i></font> Test Results for Chamber M3R4-32

Bar Codes Table. M3R4-32

Bar Codes Table. M3R4-32

Chamber M3R4	Chamber Bar Code	FEBs Bar Codes	Date Dressing	Comments
32	4UAPNB03400032	4UE20900114677 4UE20900111249 4UE20900113571	20-JUN-07	Chamber is in the Pit

Gas Leak Test. M3R4-32

Gas Leak Test. M3R4-32

Limit: <= 2mb/hour

Limit: <= 2mb/hour

Chamber	Gas Leak [mb/hour]	Test Date	Comments
32	.1		Relative methode

Durk Current Test. M3R4-32

Durk Current Test. M3R4-32

Limit: Dark Current (sum of 4 gaps) <=100nA at HV=2.9 kV Gas mixture Ar(40)/CO2(55)/CF4(5) The table presents the currents (in nA) measured in the HV line.

Limit: Dark Current (sum of 4 gaps) <=100nA at HV=2.9 kV
Gas mixture Ar(40)/CO2(55)/CF4(5)
The table presents the currents (in nA) measured in the HV line.

Chamber	2.4 kV	2.5 kV	2.6 kV	2.7 kV	2.8 kV	2.9 kV	Test Date	Comments
32	10	14	16	18	20	24	11-OCT-05	chamber is OK

Cosmic HV-Test. M3R4-32

Cosmic HV-Test. M3R4-32

Table presents counts averaged over 24 pads measured during 300 sec in the mode AND (AB&CD).
Scan1 - HV(AB) fixed @ 2550 V
Scan2 - HV(CD) fixed @ 2550 V

Chamber	Scan	2.35 kV	2.45 kV	2.55 kV	2.65 kV	2.75 kV	2.85 kV	Date	Plot	Comments
32	1 2	298 291	339 337	335 335	371 375	466 496	866 890	25-JUN-07


Fig.1 Counts/300s averaged over 24 pads. AB&CD. Scan1: HV(AB)=2550V Scan2: HV(CD)=2550V	Fig.2 Counts distribution in 24 pads. AB&CD. HV(AB)=HV(CD)= 2550 V	Fig.3 Counts/300s averaged over 8 pads in FEB1, FEB2, FEB3. AB&CD Scan1: HV(AB)=2550V Scan2: HV(CD)=2550V

Cosmic Rays and Noise Counts from Internal Counters. M3R4-32

Cosmic Rays and Noise Counts from Internal Counters. M3R4-32

Table presents counting rates (counts per 100 sec) averaged over 24 pads in bi-gap AB or in bi-gap CD measured with Thr=16fC in all channels applying HV=2550V at one of the gaps (A,B,C,D) while the other gaps are at HV=0. Also presented are the noise rates (counts per 1 sec) averaged over 48 pads (in bi-gap AB and in bi-gap CD) measured at HV=0 in all gaps with Thr=8.5fC and with Thr=10fC in all channels. The thresholds were set individually for each channel according to the relation:
Thr(reg.units)= Thr(fC)*S(reg.un/fC)-OFFSet(reg.un)+Thr_Max(reg.un). Here,
Thr_Max is the threshold at Maximum of noise rate;
OFFSet=17 reg.units (corresponding to 40mV);
S=3.40 reg.units/fC is the charge sensitivity (corresponding to Sens=7.5mv/fC accepted for M3R4 chambers);

	HV(ON)				HV(OFF)
Chamber	HV(A)=2550 GapAB	HV(B)=2550 GapAB	HV(C)=2550 GapCD	HV(D)=2550 GapCD	Thr=8.5fC	Thr=10fC	Atm.Pres.	Date	Plots	Status
32	475.3	454.8	465.4	450.5	3239.5	155.9	Pa= 961 mb	22-JUN-07


Fig.1 Counts distribution over pads in bi-gap AB (odd channels) and in bi-gap CD (even channels) at various HV combinations: Left_Up: HV(A)=2550V; HV(B,C,D)=0; Right_Up: HV(B)=2550V; HV(A,C,D)=0; Left_Down: HV(C)=2550V; HV(A,B,D)=0; Right_Down: HV(D)=2550V; HV(A,B,C)=0; Thr=16fC in all channels. Measurements time 100 sec.	Fig.2 Counts distribution over pads in bi-gap AB (odd channels) and bi-gap CD (even channels) at HV=0 in all gaps Thr=8.5fC (upper plot) and in Thr=10fC (down plot) in all channels. Measurements time 1 sec.

Thresholds Scan. M3R4-32

Thresholds Scan. M3R4-32

Tables below present:
- Thr_Max(r.u.), Thresholds in register units at Maximum of noise rate;
- N_Max, Noise rate at Thr_Max in counts/sec;
- D_100 = Thr_100(r.u.) - Thr_Max(r.u.) where Thr_100(r.u.) is the threshold in register units at noise rate = 100/s.
The following expression relates the real threshold (measured from the base-line of physical signals) with the thresholds determined by the register units:
Thr(fC)*S(r.u./fC) = Thr(r.u.) - Thr_Max(r.u.)+ OFFSet(r.u.).
Here, OFFSet=17 register units;
S=3.40 r.u./fC is the charge sensitivity corresponding to S=8mV/fC taken for M3R4 chambers;
(Note, that 1 register unit = 2.35 mV)

	FEB-1. Mean values.			FEB-2. Mean values.			FEB-3. Mean values.
Chamber	Thr_Max [r.u.]	N_Max [counts/s]	D_100 [r.u.]	Thr_Max [r.u.]	N_Max [counts/s]	D_100 [r.u.]	Thr_Max [r.u.]	N_Max [counts/s]	D_100 [r.u.]	Test Date	Plots	Comments
32	78	465360	13	75	454460	12	77	476736	13	22-JUN-07

Thr_Max in register units for M3R4-32

Thr_Max in register units for M3R4-32

FEB Channels	Ch_1	Ch_2	Ch_3	Ch_4	Ch_5	Ch_6	Ch_7	Ch_8	Ch_9	Ch_10	Ch_11	Ch_12	Ch_13	Ch_14	Ch_15	Ch_16
FEB-1	75	82	76	79	74	81	81	73	83	72	81	78	77	78	73	82
FEB-2	77	82	71	82	73	76	80	83	69	76	67	71	64	78	66	80
FEB-3	76	72	83	81	80	76	73	86	73	74	71	79	75	80	82	73

Noise rate at Thr_Max [counts/sec] for M3R4-32

Noise rate at Thr_Max [counts/sec] for M3R4-32

FEB Channels	Ch_1	Ch_2	Ch_3	Ch_4	Ch_5	Ch_6	Ch_7	Ch_8	Ch_9	Ch_10	Ch_11	Ch_12	Ch_13	Ch_14	Ch_15	Ch_16
FEB-1	470200	686520	419134	489032	334110	444840	423380	410010	375385	365467	445534	470013	424144	667635	520236	500119
FEB-2	718705	503000	566491	392101	278533	444489	394627	412922	561671	358216	359496	342347	374947	413340	620230	530247
FEB-3	502508	618149	562746	412931	361803	371960	335362	502741	514732	427218	514033	348956	511144	538209	619243	486037