Gluex doc 1131: response function

[Yves Van Haarlem <yvhaarle@ernest.phys.cmu.edu>]

Hall D Electronics:

Hi Fernando,

By looking at figure 6 in your document and comparing it with the response 
function I measured, I see that I have the same shape but in my cased the 
response is three times as long. I checked my input signal again (which 
is a step function and is shown in 
http://www.jlab.org/Hall-D/software/wiki/index.php/Electronic_chain_simulation 
)

The rise time of this step is 12.5-20~ns - I think this can cause a 
response function that is too long. This has an implication for how we we 
determine the gas-gain and on how we simulate the CDC response.

Would it be easy for you to provide me with an (eg. ascii) file containing 
your response function when you inject a step function in the CDC HV-board 
(a sample/ns) in your simulation? - guess you have to add the HV 
board-circuit. Also, is (Gerard's) shaper included in the circuit in 
figure 4 or is this just the pre-amp?

Thanks a lot!

Cheers,
 	Yves

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