As you can see...

York W detector 2635-19

1037um

> Alignments checks revealed that downstream end of
> TUDA was ~1mm off (can't remember which way).

Was the downstream flange bolted into position?

Alignments checks revealed that downstream end of TUDA was ~1mm off (can't remember which way).

Re-entrant flange (window end) found to be ~5mm too low and ~2mm to the left. Checked upstream end of chamber and was ok.

Removed bellows etc. and re-entrant flange, replaced with re-entrant flange bolts only figure tight. Tighten bolts from inside chamber whilst checking alignment, adjusting as appropriate.

Managed to get to ~0.5mm to the right and ~0.25mm too low.

This is acceptable so closed chamber and checked vacuum down to ~150mTorr.

Attached plot shows rate of pressure increase in ~2l volume upstream of TUDA with Ni window #2 installed on reentrant flange. Comparison between

a)pumping out TUDA and 2l volume, and

b) filling TUDA with ~340mbar of He and pumping out 2l volume.

In both cases, 2l volume isolated from pumps at start.

Gradients are comparible, hence no detectable He leak through window.

Will repeat with other windows and blank flange tomorrow.

A summary of online sort programs can be found at:

~/S1287/sort/README

Program sort2.f remains to be completed.

VME and sort spectra titles can be found in directory:

~/S1287/titles

A summary of the calibration procedure can be found at:

~/S1287/calibration/README

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

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

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

09.31 300        222.9      +22
10.30 300        223.1      +22
11.29 300        223.2      +22
12.29 300        223.3      +22
13.26 300        223.3      +22
14.27 300        223.5      +22
15.27 300        223.6      +22
16.28 300        223.7      +22
17.28 300        223.8      +23
18.28 300        223.9      +23
19.27 300        223.9      +23
20.27 300        223.9      +22

RAL109 Shaping Amplifier Modules

                    RAL109     Nominal  Nominal  Minimum
                    Resistor   FSR      Gain     LLD
Detector  Channels  DIP        (MeV)    (keV/ch) (keV)

S2-1 p+n  0-47      3.3k       71.4     18.6     1300
S2-1 n+n  48-63     3.3k       71.4     18.6     1300
S2-2 p+n  64-111    1k         33.3      8.7      600       
S2-2 n+n  112-127   1k         33.3      8.7      600
W p+n     128-143   1k         33.3      8.7      600
W n+n     144-159   1k         33.3      8.7      600
PDs       160-175   10k        183      47.7     3400

All RAL109 LLDs set to ~10mV (minimum)

CAEN V560 Scalers

Channel

0       Triggers
1       Triggers accepted
2       1kHz clock
3       Ortec 439
4       Pulser
5
6
7

8       S2-1 OR ch 0-15
9       S2-1 OR ch 16-31
10      S2-1 OR ch 32-47
11      S2-1 OR ch 48-63
12      S2-2 OR ch 64-79
13      S2-2 OR ch 80-95
14      S2-2 OR ch 96-111
15      S2-2 OR ch 112-127

16      W OR ch 128-143
17      W OR ch 144-159
18      PD OR ch 160-175
19
20
21
22
23

24
25
26
27
28
29
30
31

11.15 See attachment 1 for overnight EPICS log of TUDA2.CG5
      Downstream flange *not* secured by four bolts
      Current pressure 0.97Torr - rate of increase ~0.2 Torr/5h

      This history is very similar to the previous test (with 
      the flange secured by four bolts)
      - see https://elog.triumf.ca/Tuda/S1287/10

      Conclude - leak-in rate not affected by (i) lack of bolts
      securing downstream flange, (ii) addition of cabling within
      TUDA chamber - provided that the TUDA chamber has previously
      been pumped to 'good' vacuum (< 1E-05Torr, say).

16.40 Modified preamp services cabling to avoid unterminated test -
      input to PD preamp which causes reflections to previous test -
      inputs to the S2 preamps.

+/-15V PSUs

      #1 +15V/0.25A -15V/0.1A (1x 16ch PD preamp + 1x MSL type W preamp - not installed)
      #2 +15V/1.5A -15V/0.55A (2x MSL type S2 + 1x 16ch PD preamp units)

16.51 Time to 250mTorr ~14m
      Time from 250mTorr to 4.75E-05Torr ~40m
      See attachment 2

17.50 FTS RS44 set point +5.5 deg C

18.48 TUDA2.PNG5 7.8E-06Torr

      FTS RS44 set point +21 deg C
      Cryo pump gate valve closed
      Turbo pump off
      Four bolts securing downstream flange removed
 
      Vent to c. 300mbar with *He*

      N.B. TUDA2.CG5 reads 770 Torr with 300mBar of He in TUDA chamber

      MKS Baratron (capacitance manometer - gas independent reading)
      attached to manual vent port of the Varian V550 turbo pump
      Pressure reading at 'good' vacuum 0.0 Torr - no offset

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

19.08 300        221.7
19.18 300        222.0      +19
19.28 300        222.1      +20
19.38 300        222.3      +20
19.48 300        222.4      +21
20.08 300        222.6      +21

10.02 See attachment 1 for overnight EPICS log of TUDA2.CG5
      Downstream flange secured by four bolts
      Current pressure 1.07Torr - rate of increase ~0.2 Torr/5h

11.30 TUDA chamber pumped down to ~800mbar
      Downstream flange bolts removed - no change in pressure observed
      N2 bottle connected to TUDA vent valve - to vent and (hopefully)
      exceed atmospheric pressure forcing downstream flange to move open
      Pressure measured using MKS Baratron 1000Torr gauge

      Result - pressure increased from 800 to ~1000mbar in ~45s
      TUDA chamber pressure did not noticably exceed atmospheric
      pressure and there was no obvious movement of downstream flange.
      Gas could be felt escaping from sides of downstream flange.

      Conclude - contact with downstream flange O-ring failed at, or near,
      atmospheric pressure - this prevented buildup in excess of atmospheric
      pressure

11.50 Installed:

      preamp services (+/-15V preamp power, +/- preamp test inputs) - 10-way IDC
      ribbon cables

      detector HT - SMC/BNC cabling

      preamp signals - 34-way IDC twist-n-flat ribbon cables

      preamp thermocouple attached to an S2-1 preamplifier

15.00 Time to 250mTorr ~14m
      Time from 250mTorr to 4.75E-5Torr ~45m
      See attachment 2

16.04 FTS RS44 set point +5.5 deg C

16.21 FTS RS44 temperature +5.6 deg C

17.12 TUDA2.PNG5 8.2E-06Torr
      FTS RS44 temperature +5.8 deg C
      Preamp thermocouple +8 deg C

17.13 +/-15V preamp power ON

17.18 Preamp thermocouple +14 deg C
      TUDA2.PNG5 8.0E-06Torr

17.23 Preamp thermocouple +14 deg C
      TUDA2.PNG5 7.9E-06Torr

17.28 Preamp thermocouple +15 deg C
      TUDA2.PNG5 7.7E-06Torr

17.43 Preamp thermocouple +15 deg C
      TUDA2.PNG5 7.0E-06Torr

CAEN SY403 HV mainframe

      Channel HT Detector Bias  I_L
                           (V) (uA)

          1    1   S2-1   -130  -0.03
          2    2   S2-2   -130  -0.06
          3    3   W      -250  -0.02
          4    4   PD      -30  -0.03

      Low leakage currents as expected - no evidence of high resistance
      shorts

      All other channels set to 0V

+/-15V PSUs

      #1 +15V/0A -15V/0A (MSL type W preamp not installed)
      #2 +15V/1.65A -15V/0.65A (2x MSL type S2 + 1x 16ch PD preamp units)

17.58 Preamp thermocouple +13 deg C
      TUDA2.PNG5 6.3E-06Torr

18.13 Preamp thermocouple +12 deg C
      TUDA2.PNG5 5.8-06Torr

18.29 Preamp thermocouple +12 deg C
      TUDA2.PNG5 5.3-06Torr

18.32 +/-15V preamp power OFF
      FTS RS44 set point +21 deg C

18.39 Cryo gate valve closed
      Turbo off and isolated
      4x bolts securing downstream flange removed

      Repeat yesterday's leak-in test (bolts removed)

    

09.20 TUDA2.PNG5 1.04E-06Torr
      See attachments 1 & 2 for EPICS log of pump down and overnight
      pumping

09.37 Vent TUDA

14.00 S2-2 and W positions swapped
      Coolant loop disconnected - needs to be re-tested

15.08 Time to 250mTorr ~12m
      Time from 250mTorr to 4.75-05Torr ~28m
      See attachment 3

15.36 FTS RS44 set point +5.5 deg C

17.00 TUDA2.PNG5 4.5E-06Torr

17.14 FTS RS44 set point +22 deg C

17.31 TUDA2.PNG5 6.2E-06Torr

Cryo closed and turbo pump switched off. Will monitor leak-in rate
from good vacuum (< 1E-05 Torr) overnight. 
     

attached

note. s2 position in fig. 1 is wrong, should be 360mm.

27/06/11 - final version of safety report added (produced just before the experiment began).

2um x 8 mm Ni windows leaked tested on TUDA gas cell. With window placed on the outside of the cell, cell was evacuated and pressure monitored with time, i.e. 1atm differential air pressure. Comparison to leak rate with blank flange also do.

Tests were performed in order: Ni, 30 minuets pumping, Ni again, blank, Ni third time.

Plots are the same data, different scales.

The TUDA @ ISAC-II grounding test was successfully completed this am
per work permit 2011-04-12-2.

We measured 60V/0mA (with PSU) and 0.385MOhm with a Digital multimeter.

The TUDA grounding test is now complete. The TUDA ground breaker switch
is now closed and locked. The lockout key has been returned to ISAC Ops.

11.27 TUDA2.PNG5 6.27E-07Torr

11.30 Vent to install experiment configuration and coolant loop

14.00 Experiment configuration (https://elog.triumf.ca/Tuda/S1287/2)
      installed.

      Coolant loop installed.

      FTS RS44LT recirculating chiller coolant (ethanol) drained from
      reservoir and returned to 5-litre red plastic gerry can - now stored
      in Pat Walden's N. Cupboard in the ISAC-I hall.

      FTS RS44LT coolant now 7-stage filtered water from ISAC-II cleaner's
      room (on the corridor to rooms 148 & 154).
      
      FTS RS44LT Set Low (SL) parameter changed from -43 deg C to +5 deg C

15.00 Test of coolant loop in air - no gross leaks

15.30 Commence pump down to test coolant loop at vacuum

      See attachment 1 - time from turbo ON to 5.0E-5Torr ~18m

      FTS RS44 switched on ~25' before datum - set point +5.5 deg C
      TUDA.PNG5 pressure continues to decrease - coolant loop appears
      to be OK

16.55 FTS RS44 temp +5.8 deg C
      TUDA2.PNG5 9.24E-06Torr

      FTS RS44 set point +22 deg C

      Will leave pumping overnight with FTS RS44 off

TUDA was successfully re-installed on SEBT1 by LB, TD, AML and PM.
Alignment checked by pillar mounted telescope downstream of HERACLES
and target ball between SEBT1 bending magnet and diagnostic section. 
With minor adjustments of upper stage table the upstream and downstream
targets were within 15 thou L-R/U-D. Upper stage table and feet locked.

14.00 Cryo pumped by TUDA2:BP5 to <100mTorr
      TUDA2.RVC5 closed and cryo compressor switched on
      See attachment 1 for EPICS log

Note: MiniSys Eye-IMG ion gauge installed (EPICS readout only)

Re-entrant flange assembly installed - currently the 'window' NW25
fitting is open.

Centre target ladder linear translator re-installed. Note the
downstream linear translator needs to be moved to the upstream
position.

18.28 Time from 1 bar to 250mTorr ~12m (turbo ON)
      Time from 250mTorr to 5.0E-4Torr ~5m (cryo ON)

Note: Transients in TUDA:PNG5:RDVAC when cryo gate valve opened
      Observed pressure decreases to <1E-10Torr (PM tells
      me that for this gauge this effectively means 'off'
      cf. the usual TUDA ion gauge which reads high when 'off') 

      Time from 5.0E-4Torr to 5.0E-05Torr ~6m ('good' vacuum)

      Total pump down ~24m (empty chamber)
      See attachment 2 for EPICS log

07.32 Tuesday 12 April
      See attachment 3 for overnight EPICS log
      TUDA2:PNG5:RDVAC 7.2E-07Torr

Work permit (2011-4-11-3) was requested to vent SEBT1 upstream of TUDA chamber
and HERACLES to permit line-of-sight for alignment of TUDA chamber. Note that
Facility Coordinators are Lothar Buchmann/Pat Walden/Sky Sjue and Gordon Ball/Randy
for TUDA and HERACLES respectively. 

Wipe test was performed by Tom Davinson (PPE: respirator and gloves).
Samples checked by Fiona Holness RPG - check OK.

tuda2 (by TUDA chamber, SEBT1) was powered off on arrival
- this may have been due to a previous power outage between
March 18-April 4. Rebooted OK.

MIDAS DAQ operational

MIDAS DAQ reads out CAEN V560 Scaler #1 channels #0-7 (see
file VMEDataSources below) on a per event basis.

Data directory tuda2:/data2/data/S1287

S1287 requires 64+64+32+16=176 channels of ADCs/TDCs
i.e. 6x Silena 9418/6V ADCs and 2x CAEN V1190A TDCs. 
Currently configured for 11x ADCs, 3x TDCs and 2x Scalers. 

Note - VME crate #2 (top) displays a yellow 'overheat'
warning LED. This is probably bogus - the air and PSU
temperatures reported by the front panel look OK.

MIDAS DAQ works for mode 'MIDAS Data Acquisition' and
'TUDA'. For the latter, all scalers and the EPICS variables
(defined by tuda:/MIDAS/TUDA/tcl/EpicsDefn.tcl - see below)
are readout every 20s.

Nominal detector configuration for S1287 is as follows:


Detector   Tgt Ladder #2
             -Detector      Nominal LAB     Solid
           Distance (cm)    Angles (deg)  Angle (sr)

 S2-1        7.0            9.5-26.4      0.430
 S2-2        28.0           2.4-7.1       0.032

 W           >35.0          0.0-4.1      ~0.020

S2-1 MSL type S2(DS)-500
S2-2 MSL type S2(DS)-500
W    MSL type W(DS)-1000

Hardware installed in TUDA chamber is as follows (listing from
upstream to downstream):

1 Upstream support collar

2 PDs (to monitor Ni window)
  PD preamplifier assembly

3 4mm dia collimator
  CCTV camera?

Target Ladder - Position #1 - 83cm from inner surface of the downstream flange
  5mm dia anti-scatter collimator
  PDs (to monitor 197Au RBS)

Target Ladder - Position #2 - 75cm from inner surface of the downstream flange
  10mm & 3mm dia tuning apertures, ZnS, PDs, (CH2)n targets

4 S2-1 DSSSD
  S2 preamplifier assembly

5 S2-2 DSSSD
  S2 preamplifier

6 W DSSSD
  W preamplifier assembly (to be shipped to TRIUMF)

7 Faraday Cup

8 Downstream 4-vane monitor (not used)

Detector mounts will be within +/-5mm of their nominal positions.