EFED 0.04uA
DEED 0.05uA
PHDI 0.13uA

 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.

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.

 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

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

Gafchromics foil was mounted on empty brass frame back to back with Li sample

Neutron beam goes well through the sample. Centered ~1 cm from sample center. Conclusion: no changes needed (too risky to make it worse and it is ok now)

B looks as we are used to , Li tritons are now stopped in the detector and should appear around 2.8 MeV. 

An empty frame (on the top) was placed on Friday night.

After inserting aluminium target, previously-dead channel 24 on EDET was re-plugged into a 12-bit card SPD02872. It is the only EDET on 12-bit card, the rest are on 14-bit. From pulsers, there appears to be a 90 ns offset from this EDET to others, with EDET24 preceeding the rest. The last channel on 14-bit cards was broken, hence havng to use 12-bit.

E front 2x16-way to 1x34-way IDC cable from the Junction Box to the IDC-Lemo 00 adaptor was found to be inserted upside-down - the 16-way IDC connectors did not have polarisation keys - meaning the E detector p+n junction strip signals collected with 26Al for the first night are not working. Signals from the dE p+n junction strips and E n+n Ohmic strips will be OK. The mistake occurred at the conclusion of the noise tests yesterday - see https://elog.ph.ed.ac.uk/nToF/52

The 2x16-way to 1x34-way IDC cable without polarisation keys has now been replaced.

Run 216417 and onwards have correct cabling. For runs before that, E back and dE are still reliable.

Dear all,

There was an issue with one of the strips of the deltaE detector (DEED 14), for run216644. The gain dropped to almost a factor of 3. Find attached.

Somehow, it was fixed, but still lags, when compared to other strips of deltaE. This was tested for a more recent run, run216651. Find attached.

I also checked a bit older run (run216637) and they look similar.. Find attached. Maybe we should figure out if this will be a problem for the DEED14 strips.

NOTE: The plots have the run number at the top-center.

Emmanuel Odusina

After long beam-off, changed detector mount by moving it 2 cm forward into the beam, after removing LiF 3.

List of the detectors and the connections.

dE Detector: W1-20 3186-9 20 um

E Detector: W1-150 3458-4 144 um

Voltages and Leakage Currents:

dE: 6 V, 0.02 muA

E: 50 V, 0.05 muA