Process alpha data
- Compare pulser width and alpha width to calibration spectra (shaping amp with 1us and gain 50x)
- Does photodiode data process OK or is it a problem with the oscillations?

Process LiF data
- Any pile up issues? Problems with gamma flash?

Online monitoring:
- Check leakage every few days, check lab temp.
- Check alpha peaks of 26Al contaminants - Gd, B.
 

 Pulser set to 100 pps.

Shaping amp:
Gain: 1x1.0x50
Tau: 2 us
Negative polarity.

 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%

 

 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%

***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%

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

 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

 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.

 Morning - 9am

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

Afternoon - 4.30pm

E=0.03uA
dE= 0.03uA
PHDI=0.05uA
 

 At lunchtime (12.45)

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

 E = 0.03uA
dE = 0.04uA
PHDI = 0.06uA

- Monitor PHDI - increasing slowly...

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.

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

EFED 0.04uA
DEED 0.05uA
PHDI 0.13uA

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.

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

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.

Still using pulser triggered from protons. 12 microsecond delay from protons to gamma-flash + 11 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 11 microsecond delay for approx. 2 hour, then change to an overnight run with pulser running NOT triggered from beam.

The pulser has been switched from triggering from beam trigger to running at a 10 Hz rate, and will now appear in random places in signal traces. Planned to run overnight measuring LiF3, switch to empty + detector in beam in the morning.