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Chris,</div>
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There are 4 veto counters and 3 reference PMT for the LMS. So we need 7 ADC channels. We also need TDC for RF.</div>
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We would also need TDCs for the tagger. The number of channels is to be determined, but not many.</div>
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I am not sure we are ready for streaming readout.</div>
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<p><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: black;">-Eugene</span></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> PRad <prad-bounces@jlab.org> on behalf of Chris Cuevas via PRad <prad@jlab.org><br>
<b>Sent:</b> Wednesday, November 20, 2024 12:50<br>
<b>To:</b> Dutta, Dipangkar <dd285@msstate.edu>; gasparan <gasparan@jlab.org><br>
<b>Cc:</b> PRad mail group <prad@jlab.org><br>
<b>Subject:</b> Re: [PRad] [EXTERNAL] Re: Fwd: Re: Beamline Configuration Drawings for PRAD II, X17 and TFF</font>
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Greetings All,</div>
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Yes, the electronics in 4)c) caught my eye,,</div>
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I believe we can accommodate readout for a third GEM, but a decision sooner than later will be very helpful.</div>
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<br>
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Regarding the veto detectors, and I can review the collaboration slides, how many channels will be required for these signals?</div>
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Expanding the veto discussion with regards to a 'trigger' is something that we [DAQ] need to capture on the trigger requirement list.</div>
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There was mention also about running the DAQ for PRADII in streaming mode, where all channels are readout out in a continuous fashion </div>
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based on a fixed synchronous time window. The Streaming ReadOut topic would require further discussion/decisions, and we can add this to </div>
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a near future meeting or in a WG focus discussion. </div>
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Regards,</div>
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-Chris</div>
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~~~~~~~~~~~~~~ </div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> PRad <prad-bounces@jlab.org> on behalf of gasparan via PRad <prad@jlab.org><br>
<b>Sent:</b> Wednesday, November 20, 2024 11:51<br>
<b>To:</b> Dutta, Dipangkar <dd285@msstate.edu><br>
<b>Cc:</b> PRad mail group <prad@jlab.org><br>
<b>Subject:</b> Re: [PRad] [EXTERNAL] Re: Fwd: Re: Beamline Configuration Drawings for PRAD II, X17 and TFF</font>
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Hi Dipangkar,<br>
<br>
Yes, I forgot to list this item too, thanks.<br>
4) the GEM efficiency high accuracy measurement using the so-called <br>
third GEM.<br>
As we discussed on Monday, this item is not fully clear to me. My <br>
question<br>
was, and still is, what is the accuracy of these measurements using <br>
the GEM1,<br>
GEM2 and HyCal (plus the target vertex, we even have 12C foil in the <br>
target cell)?<br>
Nilanga, Weizhi, Chao and who wants to contribute in this part, <br>
please come up<br>
with your arguments on this part.<br>
My approach is that if we even will end up needing the third GEM <br>
then there are<br>
several open item on this way: (a) the size of the third GEM; (b) we <br>
still will<br>
need to attach and survey it better than 1 mm (better than HyCal is <br>
providing it);<br>
(c) the electronics ...<br>
<br>
Please prepare for the Friday's discussion.<br>
<br>
Ashot<br>
<br>
<br>
On 2024-11-20 11:17, Dutta, Dipangkar wrote:<br>
> Hi Ashot,<br>
> <br>
> One more item is the GEM support structure ( 2 GEM planes vs 3 GEM<br>
> planes). I believe it should be possible to hold procurement just for<br>
> this item until a final decision is made. Also, we may have to wait to<br>
> finalize this part until all GEM parts have been procured.<br>
> <br>
> Cheers<br>
> <br>
> Dipangkar<br>
> <br>
> From: PRad <prad-bounces@jlab.org> on behalf of gasparan via PRad<br>
> <prad@jlab.org><br>
> Date: Wednesday, November 20, 2024 at 10:04 AM<br>
> To: PRad mail group <prad@jlab.org><br>
> Subject: [PRad] Fwd: Re: Beamline Configuration Drawings for PRAD II,<br>
> X17 and TFF<br>
> <br>
> Hi All,<br>
> <br>
> As you see Bob wants to fix the engineering drawings for the<br>
> experiments. We are<br>
> equally interested in finalizing this part to start the procurement<br>
> and<br>
> construction<br>
> phase.<br>
> <br>
> There are few items still not finalized on this part, let us try to<br>
> work on them before<br>
> this Friday meeting, discuss them there and answer to Bob.<br>
> <br>
> 1) veto scintillators thickness: we are testing them now but, it<br>
> will<br>
> take another week<br>
> if not more. I will contact Youri to see if this is important for<br>
> <br>
> the engineering design<br>
> part.<br>
> 2) Veto scintillator attachment tolerance: we are working on this<br>
> item<br>
> but, it will need<br>
> again a week or so. I will contact with Youri and Dipangkar to<br>
> see<br>
> if a 0.5 mm tolerance<br>
> is realistic (for both edges of a single scintilator). In all<br>
> cases<br>
> we need survey ponts<br>
> on this device.<br>
> Weizhi, please make this item a priority before the weekend. If<br>
> we<br>
> need one more meeting,<br>
> I am ready for that.<br>
> 3) Changing the vacuum window from X17 to PRad_II experiments (as it<br>
> <br>
> was shown by Bob).<br>
> This is highly undesirable since it will involve not only the<br>
> vacuum<br>
> part (that comes<br>
> from the target change also) but, it will require a new survey of<br>
> <br>
> the HyCal.<br>
> If we decide to run PRad-II with the new (smaller) window, then<br>
> the<br>
> Pb-glass part of the<br>
> HyCal no longer in use (if even it is ready).<br>
> Weizhi and Chao, please take one more look on this part to before<br>
> <br>
> the weekend.<br>
> <br>
> 4) What else is there to be discussed???<br>
> <br>
> Thanks,<br>
> Ashot<br>
> <br>
> -------- Original Message --------<br>
> Subject: Re: [PRad] Beamline Configuration Drawings for PRAD II, X17<br>
> and<br>
> TFF<br>
> Date: 2024-11-20 08:17<br>
> From: Bob Miller via PRad <prad@jlab.org><br>
> To: Eugene Pasyuk <pasyuk@jlab.org>, "prad@jlab.org" <prad@jlab.org>,<br>
> "pi0tff@jlab.org" <pi0tff@jlab.org><br>
> Cc: Christopher Guthrie <guthrie@jlab.org><br>
> Reply-To: Bob Miller <rmiller@jlab.org><br>
> <br>
> Good Morning All,<br>
> <br>
> Are there any comments on the layout of PRad II and X17, or do we<br>
> assume the design is fixed and we can finalize the drawings and<br>
> prepare<br>
> to order parts?<br>
> <br>
> Thanks,<br>
> <br>
> Bob Miller<br>
> Hall B Lead Engineer<br>
> (757) 822-9586<br>
> <br>
> -------------------------<br>
> <br>
> From: Eugene Pasyuk <pasyuk@jlab.org><br>
> Sent: Thursday, October 31, 2024 3:33 PM<br>
> To: prad@jlab.org <prad@jlab.org>; pi0tff@jlab.org <pi0tff@jlab.org><br>
> Cc: Bob Miller <rmiller@jlab.org>; Christopher Guthrie<br>
> <guthrie@jlab.org><br>
> Subject: Fw: Beamline Configuration Drawings for PRAD II, X17 and TFF<br>
> <br>
> Here are the beamline drawings for PRad/X17/TFF.<br>
> Please review and give your feedback by November 15th.<br>
> <br>
> -Eugene<br>
> <br>
> -------------------------<br>
> <br>
> From: Christopher Guthrie <guthrie@jlab.org><br>
> Sent: Thursday, October 31, 2024 14:47<br>
> To: Eugene Pasyuk <pasyuk@jlab.org><br>
> Cc: Bob Miller <rmiller@jlab.org><br>
> Subject: Beamline Configuration Drawings for PRAD II, X17 and TFF<br>
> <br>
> Eugene,<br>
> <br>
> I have attached .pdf’s of the Preliminary versions<br>
> PRAD II, X17 and TFF Beamline Configuration Drawings. Can you please<br>
> send these out to the individual run groups and request comments by<br>
> November 15th?<br>
> <br>
> Regards,<br>
> <br>
> Chris Guthrie<br>
> <br>
> Hall B Senior Mech. Designer<br>
> <br>
> (757) 269-6922<br>
> _______________________________________________<br>
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