Midas Consoles SR35 user manual Format, AFS data path

Data written as ASCII file: alc_05_NNNN.dat

(run number NNNN)

format:

19 header lines followed by data, lines containing 48 coloumns each

!File: /home/l_musr_alc/exp/alc/alc_05_0270.dat
!Run : 270
!Start/Stop time: 01:25:32 (30-04-2005) / 06:55:08 (30-04-2005)
!Comment: cell 107,				15% DHTAC / 50 mole% ortho-chlorobenzoate, 35C
!Field [T]: prescan = 1.5000;					from = 1.5500; to = 2.3000;				step = 0.0005
!Temperature (cold finger) : T1 = 346.503 K;							dT1 =	0.029 K
!Temperature (sample plate): T2 = 350.154 K;							dT2 =	0.063 K
!Preset Count: 1500000					0x00000004
!Group of preset			detectors:
!Group of forward			detectors: 0x007f0000
!Group of backward detectors: 0x000007f0
!
!
!
!
!
!	-------------------------------------------------------------------------------B_IPS	asym		a_err	I_IPS		B_NMR	B_Hall	T1	T2		reserve[0..7]			scaler[0..31]
!
!	-------------------------------------------------------------------------------1.5500	0.11370		0.00031	22.79400		1.5481	1.5480	346.629	350.034			0		0		0
0						0					0
		0		0	0		0	9042	1601696	0		915025		829539		925851
756272		827958		883336	764988		0	0	0			0	862837		751539		743396
512164		508840		602534	716321		0	0	0	0		0		0		0	0
0	1.5505	0.11459		0.00030	22.80140		1.5485	1.5480	346.660	350.027			0		0		0
0						0					0
		0		0	0		0	9149	1620915	0		927877		842968		938642
767071		839195		895571	777035		0	0	0			0	872329		758847		754103
518703		514314		612899	725841		0	0	0	0		0		0		0	0
0

scaler[28] – [31] contains the sums of all detector counts in fw and bw generated by an FC103 ‘OR’ unit. This avoids counting of double hits.

sb_pos = scaler[28]; sb_neg = scaler[29]; sf_pos = scaler[30]; sf_neg = scaler[31];

The resulting asymmetry and error are written in reserve[0] – [3] for pos. and neg. electric field applied (asy_pos, errasy_pos, asy_neg, errasy_neg). (Only negative polarity if no electric field clock signal present!).

AFS data path:

/afs/psi.ch/project/bulkmusr/data/alc/ti/ defined as DATAPATH on pc5145: cd $DATAPATH

visualize, e.g., gnuplot: plot “alc_05_0123.dat” u 1:2:3 w e

use Root on pc5145:

cd /home/l_musr_alc/ALC root -l DoALC.C

[] load();

[] plot();

[] combine();

[] save();