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Estimating from diagram (see below) something like 75 deg vs 125 deg.</div>
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Donald Jones</div>
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Hall A/C Staff Scientist</div>
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Jefferson Lab</div>
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Newport News, VA</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Brian Eng <beng@jlab.org><br>
<b>Sent:</b> Monday, May 6, 2024 10:29 AM<br>
<b>To:</b> Ellen Becker <ebecker@jlab.org>; Mark Kevin Jones <jones@jlab.org>; dsg-halla_ecal@jlab.org <dsg-halla_ecal@jlab.org>; Marc Mcmullen <mcmullen@jlab.org>; Donald Jones <jonesdc@jlab.org><br>
<b>Subject:</b> Re: Hall A Beam Current</font>
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The input impedance on the cRIO TC modules is quite high at 78 MŮ so the additional resistance shouldn't effect the accuracy that much, but it will to some degree mainly in the form of an offset error.</div>
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The main thing with going with a longer cable length is to make sure it's not near any sources of EMI like power cables, motors, etc. Having at least an overall cable shield will help there some. I'm not sure this application requires the accuracy/hassle/expensive
of including individual shields.</div>
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What is the angle of the planned bunker vs where the DAQ one is located?</div>
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<div id="x_divRplyFwdMsg" dir="ltr"><span style="font-family:Calibri,sans-serif; font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Dsg-halla_ecal <dsg-halla_ecal-bounces@jlab.org> on behalf of Donald Jones via Dsg-halla_ecal <dsg-halla_ecal@jlab.org><br>
<b>Sent:</b> Monday, May 6, 2024 9:44 AM<br>
<b>To:</b> Ellen Becker <ebecker@jlab.org>; Mark Kevin Jones <jones@jlab.org>; dsg-halla_ecal@jlab.org <dsg-halla_ecal@jlab.org>; Marc Mcmullen <mcmullen@jlab.org><br>
<b>Subject:</b> Re: [Dsg-halla_ecal] Hall A Beam Current</span>
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Hi Marc,</div>
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I think that would be pushing it a bit too far. The usual cable length we plan on for going all the way to the bunker is 70m. We probably could get by with 60m, but that's still pretty long for thermocouple extension cables. The rates should be much much lower
at the high angle of the new bunker. You still have to worry about the isotropic neutron background bouncing around the hall. If you are concerned, we could request an additional wall of lead + poly built around your rack and put it in the back of the bunker
furthest from the opening.</div>
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-Don</div>
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Donald Jones</div>
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Hall A/C Staff Scientist</div>
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Jefferson Lab</div>
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Newport News, VA</div>
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<div id="x_x_divRplyFwdMsg" dir="ltr"><span style="font-family:Calibri,sans-serif; font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Ellen Becker <ebecker@jlab.org><br>
<b>Sent:</b> Friday, May 3, 2024 11:29 AM<br>
<b>To:</b> Donald Jones <jonesdc@jlab.org>; Mark Kevin Jones <jones@jlab.org>; dsg-halla_ecal@jlab.org <dsg-halla_ecal@jlab.org>; Marc Mcmullen <mcmullen@jlab.org><br>
<b>Subject:</b> Re: Hall A Beam Current</span>
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The large DAQ bunker would definitely be the better option if you can manage it.</div>
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<div id="x_x_x_divRplyFwdMsg" dir="ltr"><span style="font-family:Calibri,sans-serif; font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Dsg-halla_ecal <dsg-halla_ecal-bounces@jlab.org> on behalf of Marc Mcmullen via Dsg-halla_ecal <dsg-halla_ecal@jlab.org><br>
<b>Sent:</b> Friday, May 3, 2024 10:49 AM<br>
<b>To:</b> Donald Jones <jonesdc@jlab.org>; Mark Kevin Jones <jones@jlab.org>; dsg-halla_ecal@jlab.org <dsg-halla_ecal@jlab.org><br>
<b>Subject:</b> Re: [Dsg-halla_ecal] Hall A Beam Current</span>
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I wonder if the additional radiation is an issue. The expansion module has lost contact twice now and I am trying to see if there is something to it concerning radiation or perhaps just a network issue.</div>
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I know you are planning to move the shielding bunker and that will move the power supplies and interface chassis. My current plan is install the controls in that shielding. But I am wondering if using the larger bunker (DAq I think) for the controls IO connections
may be a better option.</div>
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We are getting quotes in for the thermocouple extensions now and I am using 100' as a length. Can someone calculate the run from the detector to the large bunker? Just for the controls, so it would be the thermocouple extensions (~200 pairs) from the detector,
and then some low voltage runs from the controls to the power supplies (control voltage = 16 pairs, current readback = 16 pairs).</div>
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I'll keep an eye on the system this weekend and see if the issue persists.</div>
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Additionally, I'll find out which switch its on and see if the issue is there.</div>
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Marc</div>
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<div id="x_x_x_x_divRplyFwdMsg" dir="ltr"><span style="font-family:Calibri,sans-serif; font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Donald Jones <jonesdc@jlab.org><br>
<b>Sent:</b> Friday, May 3, 2024 10:32 AM<br>
<b>To:</b> Marc Mcmullen <mcmullen@jlab.org>; Mark Kevin Jones <jones@jlab.org><br>
<b>Subject:</b> Re: Hall A Beam Current</span>
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Hi Marc,</div>
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Just going from memory, I think it is IBC1H04CRCUR2. The current is lower but the radiation is higher because now we have a liquid target as opposed to gas before.</div>
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-Don</div>
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Donald Jones</div>
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Hall A/C Staff Scientist</div>
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Jefferson Lab</div>
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Newport News, VA</div>
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<div id="x_x_x_x_x_divRplyFwdMsg" dir="ltr"><span style="font-family:Calibri,sans-serif; font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Marc Mcmullen <mcmullen@jlab.org><br>
<b>Sent:</b> Friday, May 3, 2024 10:30 AM<br>
<b>To:</b> Mark Kevin Jones <jones@jlab.org><br>
<b>Cc:</b> Donald Jones <jonesdc@jlab.org><br>
<b>Subject:</b> Hall A Beam Current</span>
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Hi Mark and Don,</div>
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Do you guys know the PV name for the beam current in Hall A? Also, in general, is the beam current higher now than in November?</div>
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Thanks,</div>
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Marc</div>
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