05-3-2017

The He-3 detector output from the spec amp to the ADC had the wrong polarity

Electronics map for the two auxiliary scintillators

Phi Angle (Degrees)	PMT distance	Signal cable label	HV cable label	HV channel on Lecroy Mainframe	CFD CH	VNIM-ECL channel	ROOT variable
~282	m	102B1.2	shv1.2	5:L1.2	1	(left) B-0	evt.TDC[1][25]
~282	m	282T1.7	shv1.7	5:L1.7	2	(left) B-1	evt.TDC[1][26]

run list

He-3 timing is in patch panel 223A16, & energy is 223A17.

High voltage & discriminator settings:

30T: 1450;30 , 30B:1450;30 , 54T: 1500;30 , 54B: 1500;30 , 78T:1500;30 , 78B: 1525;30 , 126T: 1500;30 , 126B: 1500;30 , 150T: 1500;40 , 150B: 1500;40 , 210T: 1500;40 , 210B: 1500;40 , 234T: 1500;30 , 234B: 1500;30 , 258T: 1350;30, 258B: 1450;30 , 306T: 1400;30 , 306B: 1400;30 , 330T: 1450;30 , 330B: 1500;30

Radiator 1.5" Al.

Slits currently at 500 => 19 mm, at 75 =0, at 1000=38 mm, readback number is linear with slit width.

Cuts used in histograms: neutrons: 40 to 140 ns ; photons: -20 to 30 ns ; noise: 200 to 500ns

Run #	Charge/pulse	Target	Configuration	Individual histos + rates	overlayed histos	neutron coincidences per pulse	n-coin error	neutron coincidences per pulse per Amp	doubles/singles
6286	Integral=12.5 pV*s 260 mV peak = 1.4A	Empty	10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz			singles: 7.22E-04 doubles: 0.00E+00	singles: +- 6% doubles: +-inf%	singles/A: 5.16E-04 doubles/A: 0.00E+00
6287	Integral=12.5 pV*s	9 mm x 2cm x 4cm thick Al (1/10 R_0)	10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz			singles: 8.72E-04 doubles: 0.00E+00	singles: +- 8% doubles: +-inf%	singles/A: 6.23E-04 doubles/A: 0.00E+00
6288	Integral=12.5 pV*s	0.5 mm x 4 cm x 2 cm DU-238 R45020	10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz ,			3.20E-03 doubles: 9.11E-06	singles: +- 3% doubles: +-57%	singles/A: 2.29E-03 doubles/A: 6.51E-06	doubles/single: 2.85E-03
	Coincidence analysis while using data from the first 40 minutes of run 6283 from yesterday, combined with the data from run 6288 ( yesterday's runlist) ====>>						singles: +- 1% doubles: +-24%		doubles/single: 4.0E-03
6290	Integral=12.5 pV*s	0.5mm x 2cm x 4cm Th #170113000	10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz ,			singles: 1.76E-03 doubles: 6.64E-06	singles: +- 4% doubles: +-70%	singles/A: 1.26E-03 doubles/A: 4.75E-06	doubles/single: 3.77E-03
6291	Integral= 11.5 pV*s	HEU Tag #HMF-SNM-ER-2L	10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 1.4 A Peak , 180.4 Hz ,			singles: 2.26E-03 doubles: 4.61E-06	singles: +- 2% doubles: +-57%	singles/A: 1.61E-03 doubles/A: 3.30E-06	doubles/single: 2.04E-03
6292	Integral= 7.5 pV*s	0.5 mm x 4 cm x 2 cm DU-238 R45020	10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 0.9 A Peak , 180.4 Hz			2.10E-03 doubles: 9.49E-06	singles: +- 1% doubles: +-25%	singles/A: 1.50E-03 doubles/A: 6.78E-06	doubles/single: 4.52E-03
6293	Integral= 4.5 pV*s	0.5 mm x 4 cm x 2 cm DU-238 R45020	10.6 MeV (1123 Gauss) , 3 ns FWHM pulse width , 0.7 A Peak , 180.4 Hz			singles: 1.39E-03 doubles: 3.58E-06	singles: +- 2% doubles: +-49%	singles/A: 9.93E-04 doubles/A: 2.56E-06	doubles/single: 2.58E-03

beam profile

circle=2cm ; inner ring = 5cm ; outter ring = 10 cm

coincidence rates

The y-axis below is calculated as follows: [math]\frac{doubles}{singles-grass}[/math] , where grass is the collection of events that lie outside both the neutron and the gamma ToF range, normalized per ns, and multiplied by the width (in ns) of the neutron ToF range. Forward detectors not included. The run numbers are, in order from least to most neutron singles, 6293,6292,6288,6280.

2nCor_44#Run_Plan