Moller Electronics 1998-2008

The electronics and DAQ was installed in 1998 and used up to 2008 with only slight modifications. The lead glass calorimeter was replaced in 2000, by a SPACAL-type calorimeter.

Detectors

The signals from both the calorimeter and the aperture counters is about 15 ns long.

Electronics

**Electronics components**
Step	Module						Signals
	function	type	bandwidth	pulse	channels	comment	input			output		comment
	function	type	bandwidth	pulse	channels	comment	step	cable	max rate	pulse	max rate	comment
1	Linear fan-out	P/S 748	250 MHz		8		Cal 1-8	-	-	20 ns	-
2	Linear fan-out	P/S 740	250 MHz		4		1	1 ns	-	20 ns	-	4L, 4R
3	Discriminator	Ortec TD8000	100 MHz	τ>5 ns	8	blocking mode	2	8 ns	-	8 ns	1 MHz	ΣL, ΣR
3	Discriminator	Ortec TD8000	100 MHz	τ>5 ns	8	blocking mode	Apert 1-2	-	-	8 ns	3 MHz	ApL, ApR
4	Delay unit	LeCroy 4518	100 MHz	τ>5 ns	16	double >10 ns	3	2 ns	3 MHz	8 ns	3 MHz	ΣL, ΣR, ApL, ApR
5	PLU	LeCroy 2365	75 MHz	τ>7 ns	16	8 outputs	4	2 ns	3 MHz	8 ns	1 MHz	Coincidences, BCM etc
6	Scaler	LeCroy 1151E	80 MHz	τ>5 ns	16		5	2 ns	1 MHz	-	-	Coincidences, BCM etc
7	TDC	LeCroy 2277	80 MHz	1 ns bin	32	double >20 ns	4	2 ns	3 MHz	-	-	ΣL, ΣR, ApL, ApR

Last updated: 04 June 2008
E-Mail: Eugene Chudakov gen@jlab.org