[Halld-tagger] [EXTERNAL] Re: Re: GlueX NIM paper: W foil
Richard Jones
richard.t.jones at uconn.edu
Wed Apr 29 14:49:39 EDT 2020
Hello Elton,
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.
-Richard Jones
On Wed, Apr 29, 2020 at 8:42 AM Elton Smith <elton at jlab.org> wrote:
> *Message sent from a system outside of UConn.*
>
>
> Hi Hovanes and Richard,
>
> Attached is a new section of the GlueX NIM paper describing the W foil.
> Lubomir suggested either of you might want to comment regarding improved
> performance of the active collimator or profiler. Take a look at the
> draft section and let me know if you have any suggestions or additions.
>
> Thanks, Elton
>
> Elton Smith
> Jefferson Lab MS 12H3
> 12000 Jefferson Ave STE 4
> Newport News, VA 23606
> (757)269-7625
> (757)269-6331 fax
>
>
>
> -------- Forwarded Message --------
> Subject: Re: GlueX NIM paper: W foil
> Date: Wed, 29 Apr 2020 08:36:07 -0400
> From: Lubomir Pentchev <pentchev at jlab.org>
> To: Elton Smith <elton at jlab.org>, Sergey Furletov <furletov at jlab.org>
> CC: Eugene Chudakov <gen at jlab.org>
>
>
>
> Elton,
>
> In the last sentence "Note that in the FDC the wires ..." add a word:
> "Note that in the FDC the sense wires ..".
>
> Also, I recall now at that time there were discussions that the W foil
> improved the operation of the active collimator and the profiler, but
> I'm not sure about that. Maybe Hovanes or Richard can comment on that
> and add a sentence if that is the case.
>
> Lubomir
>
> ------------------------------------------------------------------------
> *From:* Elton Smith <elton at jlab.org>
> *Sent:* Wednesday, April 29, 2020 7:58 AM
> *To:* Lubomir Pentchev <pentchev at jlab.org>; Sergey Furletov
> <furletov at jlab.org>
> *Cc:* Elton Smith <elton at jlab.org>; Eugene Chudakov <gen at jlab.org>
> *Subject:* Re: GlueX NIM paper: W foil
> Hi Lubomir,
>
> Find attached a screen shot of the updated section with your figure.
> Take a look at it and let me know if you have any comments. The new
> addition is available on Overleaf.
>
> Also, please send me the source file (.C) for your figure. I will likely
> need to make (small) changes to the font size and titles.
>
> Thanks, Elton.
>
> Elton Smith
> Jefferson Lab MS 12H3
> 12000 Jefferson Ave STE 4
> Newport News, VA 23606
> (757)269-7625
> (757)269-6331 fax
>
> On 4/29/20 7:33 AM, Elton Smith wrote:
> > HI Lubomir,
> >
> > Thanks for the quick turn around. I will update the document and let
> > you take a look at it. We should add that the foil was inserted just
> > upstream of the active collimator.
> >
> > Thanks, Elton.
> >
> > Elton Smith
> > Jefferson Lab MS 12H3
> > 12000 Jefferson Ave STE 4
> > Newport News, VA 23606
> > (757)269-7625
> > (757)269-6331 fax
> >
> > On 4/28/20 11:25 PM, Lubomir Pentchev wrote:
> >> ... and here's the plot.
> >>
> >> Cheers,
> >> Lubomir
> >>
> >>
> ------------------------------------------------------------------------
> >> *From:* Elton Smith <elton at jlab.org>
> >> *Sent:* Tuesday, April 28, 2020 4:56 PM
> >> *To:* Lubomir Pentchev <pentchev at jlab.org>; Sergey Furletov
> >> <furletov at jlab.org>
> >> *Cc:* Elton Smith <elton at jlab.org>; Eugene Chudakov <gen at jlab.org>
> >> *Subject:* Re: GlueX NIM paper: W foil
> >> Hi Lubomir,
> >>
> >> I should have added in my previous mail that adding a figure (or table)
> >> is very reasonable as it is something fairly unique. A modified version
> >> of the plot in your log entry might be very interesting.
> >>
> >> Thanks again, Elton.
> >>
> >> On 4/28/20 4:51 PM, Elton Smith wrote:
> >> > Hi Lubomir,
> >> >
> >> > I will wait to see your suggested contribution.
> >> >
> >> > Thanks, Elton
> >> >
> >> > Elton Smith
> >> > Jefferson Lab MS 12H3
> >> > 12000 Jefferson Ave STE 4
> >> > Newport News, VA 23606
> >> > (757)269-7625
> >> > (757)269-6331 fax
> >> >
> >> > On 4/28/20 4:43 PM, Lubomir Pentchev wrote:
> >> >> Hi Elton,
> >> >>
> >> >> You are right that this is important as the current in the DCs is
> one
> >> >> of the limiting factors for high intensity running and a reduction
> by
> >> >> a factor of 2 in the CDC was achieved in such a simple way, just
> >> >> inserting 3%W. For the FDC the optimal was 1.5%W but still we got
> 25%
> >> >> current reduction there. This is summarized in this log:
> >> >>
> >> >>
> 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=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=-MwMW0sKroUIjy-Lh9rb3KzmWIgdcbbr9_jez8RLmto&m=vXojBtVJLQicedLDzDUqX5I0pOw968itJ8ngFSgmc3g&s=kD4oNSh8uOEGz7JS6Qd4v88hAaX_yTepwWUVdHjRPUw&e=
> >> >>
> >> >> I don't know what details need to be included. Sergey did a very
> >> >> interesting characterization of the hits in the CDC based on the
> >> >> pulse shape. Is it worth including some of the plots in the above
> >> >> log, or we should keep it short?
> >> >>
> >> >> In any case I'll write paragraph and will circulated it.
> >> >>
> >> >> Cheers,
> >> >> Lubomir
> >> >>
> >> >>
> >>
> ------------------------------------------------------------------------
> >> >> *From:* Elton Smith <elton at jlab.org>
> >> >> *Sent:* Tuesday, April 28, 2020 3:22 PM
> >> >> *To:* Lubomir Pentchev <pentchev at jlab.org>; Sergey Furletov
> >> >> <furletov at jlab.org>
> >> >> *Cc:* Elton Smith <elton at jlab.org>; Eugene Chudakov <gen at jlab.org>
> >> >> *Subject:* GlueX NIM paper: W foil
> >> >> Hi Lubomir and Serguei,
> >> >>
> >> >> One of the comments to the GlueX NIM paper concerned the W foil
> >> that was
> >> >> inserted into the beamline in 2018. At the moment it is not
> >> mentioned in
> >> >> the paper at all. However, it was important in reducing our
> >> backgrounds,
> >> >> especially in the drift chambers. In addition, this is an instance
> >> where
> >> >> somebody building a similar beamline could learn from our
> >> experience. I
> >> >> brought this up at the Beamline meeting this afternoon and everyone
> >> >> agreed that it would be useful to include some information about
> >> it. I
> >> >> believe you two are the most knowledgeable about this. Let me ask
> >> you to
> >> >> write a small subsection (new Subsection 2.5) that could be added
> >> to the
> >> >> beamline section immediately before Subsection 2.5 'Active
> >> Collimator,'
> >> >> as the sections follow the physical layout of the experiment. How
> >> much
> >> >> detail should be included is partially up to you. I suppose that the
> >> >> information could be summarized in a paragraph or two, and possibly
> a
> >> >> table showing the effect of different conditions. Naomi kindly
> >> provided
> >> >> a link to an important log entry at the time at
> >> >>
> 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=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=-MwMW0sKroUIjy-Lh9rb3KzmWIgdcbbr9_jez8RLmto&m=vXojBtVJLQicedLDzDUqX5I0pOw968itJ8ngFSgmc3g&s=2-rrTpXhPLFWzo36La7K8NFdckupxsapfz0qT5Ohqp8&e=
> .
> >> >>
> >> >> I assume this would not be a large effort, mostly collecting
> >> information
> >> >> that is already available. Let me know if you are willing to do
> >> this and
> >> >> what time scale would be needed. I would be happy to help out with
> >> >> editing any text that you provide.
> >> >>
> >> >> Thanks, Elton.
> >> >>
> >> >> --
> >> >> Elton Smith
> >> >> Jefferson Lab MS 12H3
> >> >> 12000 Jefferson Ave STE 4
> >> >> Newport News, VA 23606
> >> >> (757)269-7625
> >> >> (757)269-6331 fax
> >> >>
> >> >
> >>
> >
>
>
>
>
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