[dsg-eic_dirc] Readout for the DIRC QA laser lab

[Tyler Lemon]

Hi Greg,

That is something that I can help out with.

>From the specs of the photodiodes and laser, it looks like the maximum current we can expect (if everything is perfect and everything behaves ideally) is ~12 mA when the 442-nm wavelength is used. It also looks like we'll have two photodiodes to measure at the same time during tests.

With that, something like a Keithley Model 6482, dual-channel picoammeter could be helpful.

This picoammeter has a readout range of 1 fA - 20 mA and also has built-in GPIB and RS-232 interfaces for remote control in addition to a local readout screen.
It's base cost is ~$6,500 according to their website

Does this fit into what you're looking for in terms of "quick" and "relatively cheap"?


-Tyler









________________________________
From: Grzegorz Kalicy <gkalicy at jlab.org>
Sent: Monday, September 26, 2022 1:24 PM
To: Tyler Lemon <tlemon at jlab.org>
Subject: Readout for the DIRC QA laser lab

Hi Tyler,

As I mentioned some time ago I'm trying to avoid unnecessarily complicated readout for photodiodes that we used in original setup in GSI. However, I'm struggling a bit with finding best option (quick, relatively cheap, and useable later for final automatized setup version). Who in DSG I could reach out for advise?

Cheers,

Greg
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/dsg-eic_dirc/attachments/20220926/696c06db/attachment.html>