Still using pulser triggered from protons. 12 microsecond delay from protons to gamma-flash + 1.75 microsecond delay from gamma flash to pulser. 20 mV pulser output into 50 ohm impedance (10 mV final output) of both polarities (using two pulsers, one NE pulser and one BNC PB5 pulser). Changed pulser setting to run with 5 microsecond delay for approx. 1 hour, then change to 10 microsecond delay.

Photographs of assembly up to the first pulser test with LiF3.

Changed from LiF 4 to LiF 3 after running with LiF 4 overnight (run title on n_TOF DAQ was not updated to refelect the change, and still says LiF 4, but the material setting of the run states correctly that hte run is with LiF 3).

Added pulser triggered from protons. 12 microsecond delay from protons to gamma-flash + 1.75 microsecond delay from gamma flash to pulser. 20 mV pulser output into 50 ohm impedance (10 mV final output) of both polarities (using two pulsers, one NE pulser and one BNC PB5 pulser). Planning torun with 1.75 microsecond delay for approx. 1 hour, change to 5 microsecond delay.

Setup 5.10.22

dE 20 um (ID 2837-33) and 494 um double sided (ID 1194-9)

46 channels (2 connectors missing)

LiF4 in beam 

dE: Big flat cables from preamp 22 and 23 into 1A and 1B

E: from preamp 24+25 go into 2A, 2B and 3A 3B

LEMO converter box: Cable 1: dE

                                   Cable 3: E n+n

                                  unlabeled cable: E p+n

E detector voltage: -133 V, leakage current -0.53 micro-Amp

dE detector voltage -22 V, leakage current -0.03 micro-Amp

For the E detector one of the edge p+n strip bond-wires is suspected broken.

Missing/broken items identified

- long rails for fixing chamber on support

- vacuum valve (ours is broken)

- at least 2 lemo - BNC converters

- short M3 screws (photo)

Detectors currently in the boxes:

2x MSL type W1(SS)-50, 2902-4 (53um), 2940-6 (55um)

1x MSL type W1(SS)-20 2837-33 (20um)

1x MSL type W1(DS?) 1230-10  (500 or 300 um)

1x MSL type W1(DS)-500 1194-9 (494um)

Three aluminium crates contain 26Al(n, alpha) kit from EAR2, and was in the barracks (building 6547) near detector lab by EAR1 entrance. A list is attached and photos can be found on Dropbox:

https://www.dropbox.com/sh/68k1xove2zr1bmj/AADKvN8wR_Ia2EwZMOXZqdMCa?dl=0

EFED 0.04uA
DEED 0.05uA
PHDI 0.13uA

14 bit card replaced for DEED 9-12, to prevent issue with pulser arriving before gamma flash.

E 0.03
dE 0.05
PHDI 0.12


Check on PHDI pulser width:
205170 (first in beam run) - 1.1% FWHM (at 8275 ch)
205439 (01/09/16) - 1.0% FWHM (at 8008 ch)

Seems to be holding up OK at present.

 E = 0.03uA
dE = 0.04uA
PHDI = 0.09uA

- Monitor PHDI - increasing slowly...

 E = 0.03uA
dE = 0.04uA
PHDI = 0.06uA

- Monitor PHDI - increasing slowly...

 At lunchtime (12.45)

E = 0.03 uA
dE  = 0.04 uA
PHDI = 0.06 uA

 Morning - 9am

E= 0.03uA
dE= 0.04uA
PHDI= 0.06uA

Afternoon - 4.30pm

E=0.03uA
dE= 0.03uA
PHDI=0.05uA
 

 E 0.03 uA
dE 0.04 uA
PHDI 0.05 uA

Boron target 1 towards PHDI and Boron target 3 towards dE-E.

Mylar target gluing in electronics lab.

 02.08:

dE = 0.03 uA

E = 0.03 uA

PHDI = 0.04 uA

03.08:

dE = 0.03 uA

E 0.04 uA

PHDI = 0.04 uA

 Steady for dE, E. Possibly rising on PHDI- monitor closely.

***note that DEED 16 was on old sampling rate for 205168- so use next run, also DEED 9-12 not plugged in***


  DEED16: (1 bin = 2 ch)

Pulser (DAQ):
- Centroid = 5347(3) ch
- FWHM = 89(7) ch = 1.7%
 

Pulser (Maestro):
- Centroid = 4279 ch
- FWHM = 166 ch = 3.9%

*** take the following with a pinch of salt- low stats (top of peak in DAQ = 4 counts)

148Gd (DAQ):
- Centroid = 1948 ch
- FWHM = 138 ch = 7%

148Gd (Maestro):
- Centroid = 1586 ch
- FWHM = 11 ch = 0.7%

 DEED6: (1 bin = 2 ch)

Pulser (DAQ):
- Centroid = 5145.6(6) ch
- FWHM = 51.4(1) ch = 1%
 

Pulser (Maestro):
- Centroid = 4042 ch
- FWHM = 137 ch = 3.3%
 

148Gd (DAQ):
- Centroid = 1980(1) ch
- FWHM = 64(2) ch = 3.2%

148Gd (Maestro):
- Centroid = 1564 ch
- FWHM = 61 ch = 3.9%

 DEED1: (rebin x2 -> 1 bin = 4 ch)

Pulser (DAQ):
- Centroid = 5000(1) ch
- FWHM = 71(5) ch = 1.4%
 

Pulser (Maestro):
- Centroid = 4008 ch
- FWHM = 148 ch = 4%
 

148Gd (DAQ):
- Centroid = 1880(1) ch
- FWHM = 89(2) ch = 4.7%

148Gd (Maestro):
- Centroid = 1524 ch
- FWHM = 67 ch = 4.4%