ELOG S1287

Tuda logbooks General E1104 ISACII E1195 E1103 E1147 S1287 S1203 S1233 S1284 S1447 23Na(a,p) S1540 S1381 S1847 Catania

S1287

Fields marked with * are required

Entry time:

Sun Apr 17 09:47:04 2011

Author*:

Type:

Category:

Subject:

Continuation of yesterday's test with c. 300mBar of He
in the TUDA chamber.

Bourdon    MKS        S2 preamp
                 Baratron   Thermocouple
      (mBar)     (Torr)     (deg C)

09.45 300        222.8      +21
10.44 300        222.9      +21
11.48 300        223.1      +22

11.49 FTS RS44 set point +22.0 deg C
      +/-15V preamp power ON

12.01 300        223.4      +26  FTS RS44 @ set point
12.31 300        223.7      +26
13.00 300        223.9      +26

13.01 FTS RS44 set point +15.0 deg C

13.11 300        223.4      +21  FTS RS44 @ set point
13.41 300        223.0      +22
14.11 300        222.9      +22
15.14 300        222.9      +22
16.11 300        222.9      +22
17.11 300        223.1      +22
18.16 300        223.1      +22
19.10 300        223.2      +22
20.19 300        223.1      +21

20.20 +/-15V preamp power OFF
      FTS RS44 set point +20 deg C

20.25 Bolts securing downstream flange re-installed
      - finger tight only

20.45 Vent TUDA chamber to air, i.e. chamber contains He & air

See attachment 1. Conclude that the preamps can be operated with
the FTS RS44 recirculating chiller set point +15 deg C with 300mBar
of He. The S2-1 preamplifier thermocouple indicates that the preamplifiers
are operating at about ambient temperature with little apparent effect
on gas pressure.

N.B. For vacuum operation, the FTS RS44 set point should be +5.5 deg C

Pulser tests

BNC PB-4 settings:
Amplitude 90,000 x5 attenuator IN
frequency 266Hz
delay MIN
tail pulse
t_r 50ns tau_d 1000us
INT ref 
polarity + (for p+n junction strips, - for n+n ohmic strips)

All ADC & TDC channels OK

ADCs

FWHM
Detector       (ch)   (keV)

S2-1 p+n #23   1.6    30
S2-1 n+n #8    1.6    30
S2-2 p+n #23   1.7    15
S2-2 n+n #8    1.8    16
W p+n #8       2.2    19      } using signals
W n+n #8       4.3    37      } from S2-2 preamps
PD #0          1.7    81

TDCs (0.8ns/ch)

Centroid  FWHM
Detector       (ch)      (ch)

S2-1 p+n #23   245        1.4
S2-1 n+n #8    254        1.9
S2-2 p+n #23   253        1.7
S2-2 n+n #8    260        1.8
W p+n #8       254        1.8
W n+n #8       266        1.2
PD #0          233        1.6

Encoding: HTML ELCode plain
Suppress Email notification Resubmit as new entry

Attachment 1:

He_test.png Original size: 792x612

Attachment 2:

ELOG V2.9.2-2455