[Clas12_calcom] [EXTERNAL] Re: CALCOM Meeting Friday Mar. 6

[Mac Mestayer]

Good thinking and good detective work, Raffaella!
________________________________
From: Clas12_calcom <clas12_calcom-bounces at jlab.org> on behalf of Raffaella De Vita <Raffaella.Devita at ge.infn.it>
Sent: Sunday, March 8, 2020 12:05 PM
To: clas12_calcom at jlab.org <clas12_calcom at jlab.org>
Cc: Nick Zachariou <nick.zachariou at york.ac.uk>; Geraint Clash <gc1108 at york.ac.uk>
Subject: [Clas12_calcom] [EXTERNAL] Re: CALCOM Meeting Friday Mar. 6

Dear All,
Following thee discussion we had on Friday about a possible shift of reconstructed momenta in the RG-A Fall18 outbending data, I checked the torus settings from the Mya archive. As you can see from the plot below, it seems that between 11/6/2018 and 11/12/2018, even if the torus current setpoint was -3770 A as usual, the MPS readback was -3800 and the hall probe read back was about-3796 A instead of the usual 3766. This is about 1% difference that would explain the missing mass shift observed by Geraint in the 2pi channel and the sampling fraction shift observed by Cole.
>From Mya, it seems everything went back to normal on 11/12 at 1pm. The runs affected by this potential shift are 5422 to 5476.
Best regards,
Raffaella


[cid:18074ABB-1493-48C0-954D-E193AFB12CEA at fios-router.home]

On 4 Mar 2020, at 10:51, Daniel Carman <carman at jlab.org<mailto:carman at jlab.org>> wrote:

Dear All,

There will be a CALCOM meeting this Friday, Mar. 6 at 10 a.m. EST. The preliminary agenda is available at
https://clasweb.jlab.org/wiki/index.php/2020_Meetings. Let me know if you have other topics to discuss or
updates that you would like to give. If you have slides to show please link them to the wiki.

The meeting will be in B207 for people on site. Remote participants can connect via bluejeans following the
instructions given below.

Regards,
Daniel

BlueJeans meeting information:

URL:           https://bluejeans.com/502085879<https://urldefense.proofpoint.com/v2/url?u=https-3A__bluejeans.com_502085879&d=DwMDaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=bmrX1f5CesIQ9s8Cv4WHn_rlC3XC7PaIxaw_LXCMLbk&m=QbyjVlyZRfOCusTvZpWq8gZpsqyVTUZrbGJrPfA-RQc&s=CSxrGkap3YoT_4AYRTLCQqKXeuIEjUBKr2ICHRAcdo0&e=>
Meeting Id:    502085879

Dial into the meeting :
+1 408 740 7256
+1 888 240 2560 (US or Canada only)
for other numbers see: http://bluejeans.com/numbers<https://urldefense.proofpoint.com/v2/url?u=http-3A__bluejeans.com_numbers&d=DwMDaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=bmrX1f5CesIQ9s8Cv4WHn_rlC3XC7PaIxaw_LXCMLbk&m=QbyjVlyZRfOCusTvZpWq8gZpsqyVTUZrbGJrPfA-RQc&s=5xAPv3rRuLO5wJ2-M_t229jxdxnEZui3kzwCJY5Trng&e=>

***************************************************************************
*
* Dr. Daniel S. Carman                  e-mail : carman at jlab.org<mailto:carman at jlab.org>
* Staff Scientist                          office : (757)-269-5586
* Jefferson Laboratory                web: http://userweb.jlab.org/~carman
*
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