Constant Fraction Discriminator Details - Revision history

Oborn at 06:25, 5 February 2009

2009-02-05T06:25:15Z

Oborn at 10:03, 4 August 2008

2008-08-04T10:03:40Z

Oborn at 10:03, 4 August 2008

2008-08-04T10:03:00Z

Oborn at 09:43, 4 August 2008

2008-08-04T09:43:57Z

Oborn at 09:43, 4 August 2008

2008-08-04T09:43:43Z

Oborn at 12:34, 22 July 2008

2008-07-22T12:34:04Z

Oborn at 12:32, 22 July 2008

2008-07-22T12:32:33Z

Oborn at 12:25, 22 July 2008

2008-07-22T12:25:17Z

Oborn at 12:09, 22 July 2008

2008-07-22T12:09:11Z

Oborn at 11:45, 22 July 2008

2008-07-22T11:45:51Z

New page

[http://www.caen.it/nuclear/Printable/data_sheet.php?mod=N842&fam=nim&fun=disc]

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		+	[http://wiki.iac.isu.edu/index.php/PhotoFission_with_Polarized_Photons_from_HRRL Go Back]

← Older revision		Revision as of 10:03, 4 August 2008
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	The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.		The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.

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← Older revision		Revision as of 10:03, 4 August 2008
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	The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.		The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.

−	[[Image:~~caen n842 details~~.jpg\|1200 px]]	+	[[Image:table.jpg\|1200 px]]

← Older revision		Revision as of 09:43, 4 August 2008
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	The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.		The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.

−	[[Image:caen n842 details.jpg\|~~800~~ px]]	+	[[Image:caen n842 details.jpg\|1200 px]]

← Older revision		Revision as of 09:43, 4 August 2008
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	The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.		The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.

−	[[Image:caen n842 details.jpg]]	+	[[Image:caen n842 details.jpg\|800 px]]

← Older revision		Revision as of 12:34, 22 July 2008
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	==Overview==		==Overview==

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	==Overview==		==Overview==

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		+	==Overview==
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		+	The Mod. N842 is an 8 Channel Constant Fraction Discriminator housed in a one unit wide NIM module. The module accepts 8 negative inputs and produces 2x8 NIM outputs (NIM outputs are provided with a fan-out of two)+ 8 /NIM outputs (negated) on front panel LEMO 00 connectors.
		+	The constant fraction delay is defined by a delay line network of 20 ns with 5 taps. The timing stage of the discriminator produces an output pulse whose width is adjustable in a range from 16.5 ns to 273 ns. Moreover, in order to protect against multiple pulsing, it is possible to program a dead time during which the discriminator is inhibited from retriggering.
		+	The maximum time walk is ±400 ps (for input signals in the range from -50 mV to -5 V with 25 ns rise time). The constant fraction is 20%. The individual discriminating thresholds are settable in a range from -1 mV to -255 mV (1 mV step) via an 8-bit DAC. The module can operate also with small (below 10 mV) input signals, though in this case the Constant Fraction operation is not performed, i.e. the time walk is higher. The channels’ threshold, output width and dead time can be programmed via two switches and one rotary handle placed on the front panel.
		+	The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.
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	[[Image:caen n842 details.jpg]]		[[Image:caen n842 details.jpg]]

← Older revision		Revision as of 12:09, 22 July 2008
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−	[~~http~~:~~//www.~~caen.~~it/nuclear/Printable/data_sheet.php?mod=N842&fam=nim&fun=disc~~]	+	[[Image:caen n842 details.jpg]]