<div dir="ltr">Hello Elton,<div><br></div><div>Please find attached a new macro for generating the harp profile fits according to the revised measurement errors that we agreed on at yesterday's beamline meeting. Example plots from this macro are attached below.</div><div><br></div><div>-Richard Jones</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 29, 2020 at 8:42 AM Elton Smith <<a href="mailto:elton@jlab.org">elton@jlab.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">*Message sent from a system outside of UConn.*<br>
<br>
<br>
Hi Hovanes and Richard,<br>
<br>
Attached is a new section of the GlueX NIM paper describing the W foil.<br>
Lubomir suggested either of you might want to comment regarding improved<br>
performance of the active collimator or profiler. Take a look at the<br>
draft section and let me know if you have any suggestions or additions.<br>
<br>
Thanks, Elton<br>
<br>
Elton Smith<br>
Jefferson Lab MS 12H3<br>
12000 Jefferson Ave STE 4<br>
Newport News, VA 23606<br>
(757)269-7625<br>
(757)269-6331 fax<br>
<br>
<br>
<br>
-------- Forwarded Message --------<br>
Subject: Re: GlueX NIM paper: W foil<br>
Date: Wed, 29 Apr 2020 08:36:07 -0400<br>
From: Lubomir Pentchev <<a href="mailto:pentchev@jlab.org" target="_blank">pentchev@jlab.org</a>><br>
To: Elton Smith <<a href="mailto:elton@jlab.org" target="_blank">elton@jlab.org</a>>, Sergey Furletov <<a href="mailto:furletov@jlab.org" target="_blank">furletov@jlab.org</a>><br>
CC: Eugene Chudakov <<a href="mailto:gen@jlab.org" target="_blank">gen@jlab.org</a>><br>
<br>
<br>
<br>
Elton,<br>
<br>
In the last sentence "Note that in the FDC the wires ..." add a word:<br>
"Note that in the FDC the sense wires ..".<br>
<br>
Also, I recall now at that time there were discussions that the W foil<br>
improved the operation of the active collimator and the profiler, but<br>
I'm not sure about that. Maybe Hovanes or Richard can comment on that<br>
and add a sentence if that is the case.<br>
<br>
Lubomir<br>
<br>
------------------------------------------------------------------------<br>
*From:* Elton Smith <<a href="mailto:elton@jlab.org" target="_blank">elton@jlab.org</a>><br>
*Sent:* Wednesday, April 29, 2020 7:58 AM<br>
*To:* Lubomir Pentchev <<a href="mailto:pentchev@jlab.org" target="_blank">pentchev@jlab.org</a>>; Sergey Furletov<br>
<<a href="mailto:furletov@jlab.org" target="_blank">furletov@jlab.org</a>><br>
*Cc:* Elton Smith <<a href="mailto:elton@jlab.org" target="_blank">elton@jlab.org</a>>; Eugene Chudakov <<a href="mailto:gen@jlab.org" target="_blank">gen@jlab.org</a>><br>
*Subject:* Re: GlueX NIM paper: W foil<br>
Hi Lubomir,<br>
<br>
Find attached a screen shot of the updated section with your figure.<br>
Take a look at it and let me know if you have any comments. The new<br>
addition is available on Overleaf.<br>
<br>
Also, please send me the source file (.C) for your figure. I will likely<br>
need to make (small) changes to the font size and titles.<br>
<br>
Thanks, Elton.<br>
<br>
Elton Smith<br>
Jefferson Lab MS 12H3<br>
12000 Jefferson Ave STE 4<br>
Newport News, VA 23606<br>
(757)269-7625<br>
(757)269-6331 fax<br>
<br>
On 4/29/20 7:33 AM, Elton Smith wrote:<br>
> HI Lubomir,<br>
><br>
> Thanks for the quick turn around. I will update the document and let<br>
> you take a look at it. We should add that the foil was inserted just<br>
> upstream of the active collimator.<br>
><br>
> Thanks, Elton.<br>
><br>
> Elton Smith<br>
> Jefferson Lab MS 12H3<br>
> 12000 Jefferson Ave STE 4<br>
> Newport News, VA 23606<br>
> (757)269-7625<br>
> (757)269-6331 fax<br>
><br>
> On 4/28/20 11:25 PM, Lubomir Pentchev wrote:<br>
>> ... and here's the plot.<br>
>><br>
>> Cheers,<br>
>> Lubomir<br>
>><br>
>> ------------------------------------------------------------------------<br>
>> *From:* Elton Smith <<a href="mailto:elton@jlab.org" target="_blank">elton@jlab.org</a>><br>
>> *Sent:* Tuesday, April 28, 2020 4:56 PM<br>
>> *To:* Lubomir Pentchev <<a href="mailto:pentchev@jlab.org" target="_blank">pentchev@jlab.org</a>>; Sergey Furletov<br>
>> <<a href="mailto:furletov@jlab.org" target="_blank">furletov@jlab.org</a>><br>
>> *Cc:* Elton Smith <<a href="mailto:elton@jlab.org" target="_blank">elton@jlab.org</a>>; Eugene Chudakov <<a href="mailto:gen@jlab.org" target="_blank">gen@jlab.org</a>><br>
>> *Subject:* Re: GlueX NIM paper: W foil<br>
>> Hi Lubomir,<br>
>><br>
>> I should have added in my previous mail that adding a figure (or table)<br>
>> is very reasonable as it is something fairly unique. A modified version<br>
>> of the plot in your log entry might be very interesting.<br>
>><br>
>> Thanks again, Elton.<br>
>><br>
>> On 4/28/20 4:51 PM, Elton Smith wrote:<br>
>> > Hi Lubomir,<br>
>> ><br>
>> > I will wait to see your suggested contribution.<br>
>> ><br>
>> > Thanks, Elton<br>
>> ><br>
>> > Elton Smith<br>
>> > Jefferson Lab MS 12H3<br>
>> > 12000 Jefferson Ave STE 4<br>
>> > Newport News, VA 23606<br>
>> > (757)269-7625<br>
>> > (757)269-6331 fax<br>
>> ><br>
>> > On 4/28/20 4:43 PM, Lubomir Pentchev wrote:<br>
>> >> Hi Elton,<br>
>> >><br>
>> >> You are right that this is important as the current in the DCs is one<br>
>> >> of the limiting factors for high intensity running and a reduction by<br>
>> >> a factor of 2 in the CDC was achieved in such a simple way, just<br>
>> >> inserting 3%W. For the FDC the optimal was 1.5%W but still we got 25%<br>
>> >> current reduction there. This is summarized in this log:<br>
>> >><br>
>> >> <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__nam10.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Flogbooks.jlab.org-252Fentry-252F3562987-26amp-3Bdata-3D02-257C01-257Crichard.t.jones-2540uconn.edu-257C828d5659062f43e80a2108d7ec3ac13a-257C17f1a87e2a254eaab9df9d439034b080-257C0-257C0-257C637237609412548708-26amp-3Bsdata-3Dl8Vr9MaMP0h0X4YWE596nrC5u-252F-252BxC0wHHcdrlY-252Bl1qg-253D-26amp-3Breserved-3D0&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=-MwMW0sKroUIjy-Lh9rb3KzmWIgdcbbr9_jez8RLmto&m=vXojBtVJLQicedLDzDUqX5I0pOw968itJ8ngFSgmc3g&s=kD4oNSh8uOEGz7JS6Qd4v88hAaX_yTepwWUVdHjRPUw&e=" rel="noreferrer" target="_blank">https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flogbooks.jlab.org%2Fentry%2F3562987&data=02%7C01%7Crichard.t.jones%40uconn.edu%7C828d5659062f43e80a2108d7ec3ac13a%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C0%7C637237609412548708&sdata=l8Vr9MaMP0h0X4YWE596nrC5u%2F%2BxC0wHHcdrlY%2Bl1qg%3D&reserved=0</a><br>
>> >><br>
>> >> I don't know what details need to be included. Sergey did a very<br>
>> >> interesting characterization of the hits in the CDC based on the<br>
>> >> pulse shape. Is it worth including some of the plots in the above<br>
>> >> log, or we should keep it short?<br>
>> >><br>
>> >> In any case I'll write paragraph and will circulated it.<br>
>> >><br>
>> >> Cheers,<br>
>> >> Lubomir<br>
>> >><br>
>> >><br>
>> ------------------------------------------------------------------------<br>
>> >> *From:* Elton Smith <<a href="mailto:elton@jlab.org" target="_blank">elton@jlab.org</a>><br>
>> >> *Sent:* Tuesday, April 28, 2020 3:22 PM<br>
>> >> *To:* Lubomir Pentchev <<a href="mailto:pentchev@jlab.org" target="_blank">pentchev@jlab.org</a>>; Sergey Furletov<br>
>> >> <<a href="mailto:furletov@jlab.org" target="_blank">furletov@jlab.org</a>><br>
>> >> *Cc:* Elton Smith <<a href="mailto:elton@jlab.org" target="_blank">elton@jlab.org</a>>; Eugene Chudakov <<a href="mailto:gen@jlab.org" target="_blank">gen@jlab.org</a>><br>
>> >> *Subject:* GlueX NIM paper: W foil<br>
>> >> Hi Lubomir and Serguei,<br>
>> >><br>
>> >> One of the comments to the GlueX NIM paper concerned the W foil<br>
>> that was<br>
>> >> inserted into the beamline in 2018. At the moment it is not<br>
>> mentioned in<br>
>> >> the paper at all. However, it was important in reducing our<br>
>> backgrounds,<br>
>> >> especially in the drift chambers. In addition, this is an instance<br>
>> where<br>
>> >> somebody building a similar beamline could learn from our<br>
>> experience. I<br>
>> >> brought this up at the Beamline meeting this afternoon and everyone<br>
>> >> agreed that it would be useful to include some information about<br>
>> it. I<br>
>> >> believe you two are the most knowledgeable about this. Let me ask<br>
>> you to<br>
>> >> write a small subsection (new Subsection 2.5) that could be added<br>
>> to the<br>
>> >> beamline section immediately before Subsection 2.5 'Active<br>
>> Collimator,'<br>
>> >> as the sections follow the physical layout of the experiment. How<br>
>> much<br>
>> >> detail should be included is partially up to you. I suppose that the<br>
>> >> information could be summarized in a paragraph or two, and possibly a<br>
>> >> table showing the effect of different conditions. Naomi kindly<br>
>> provided<br>
>> >> a link to an important log entry at the time at<br>
>> >> <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__nam10.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Flogbooks.jlab.org-252Fentry-252F3563927-26amp-3Bdata-3D02-257C01-257Crichard.t.jones-2540uconn.edu-257C828d5659062f43e80a2108d7ec3ac13a-257C17f1a87e2a254eaab9df9d439034b080-257C0-257C0-257C637237609412548708-26amp-3Bsdata-3DaVfL1-252BSBfpQAg-252FJN68K1zWSiMYG3bzepEd1Gh8KB-252Bk8-253D-26amp-3Breserved-3D0&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=-MwMW0sKroUIjy-Lh9rb3KzmWIgdcbbr9_jez8RLmto&m=vXojBtVJLQicedLDzDUqX5I0pOw968itJ8ngFSgmc3g&s=2-rrTpXhPLFWzo36La7K8NFdckupxsapfz0qT5Ohqp8&e=" rel="noreferrer" target="_blank">https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flogbooks.jlab.org%2Fentry%2F3563927&data=02%7C01%7Crichard.t.jones%40uconn.edu%7C828d5659062f43e80a2108d7ec3ac13a%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C0%7C637237609412548708&sdata=aVfL1%2BSBfpQAg%2FJN68K1zWSiMYG3bzepEd1Gh8KB%2Bk8%3D&reserved=0</a>.<br>
>> >><br>
>> >> I assume this would not be a large effort, mostly collecting<br>
>> information<br>
>> >> that is already available. Let me know if you are willing to do<br>
>> this and<br>
>> >> what time scale would be needed. I would be happy to help out with<br>
>> >> editing any text that you provide.<br>
>> >><br>
>> >> Thanks, Elton.<br>
>> >><br>
>> >> --<br>
>> >> Elton Smith<br>
>> >> Jefferson Lab MS 12H3<br>
>> >> 12000 Jefferson Ave STE 4<br>
>> >> Newport News, VA 23606<br>
>> >> (757)269-7625<br>
>> >> (757)269-6331 fax<br>
>> >><br>
>> ><br>
>><br>
><br>
<br>
<br>
<br>
</blockquote></div>