[Solid_daq] [Solid_ec] 5th update on the PVDIS background

[Alexandre Camsonne]

Thanks for the update.
It seems with the gate reduction and the new baffles the photon background
is improved.

Could you check again the efficiency preshower cut ? It seems it might be
better than last time.

Also not sure if you or Zhiwen can do it ? But can you plot the ratio of
highest sum of 3 divided by sum of 7 for pions and electrons ?

One odd thing from those plots it seems the pions are not an issue, am I
mistaken reading the plots ?

Do you think we still need to read full waveform ?

Alexandre


On Mon, Sep 9, 2013 at 1:55 PM, Jin Huang <jinhuang at jlab.org> wrote:

> > In your plots you are using an up to 3.8 GeV threshold for the trigger
> curve. What is the effect on the electron rate and expected error?
>
> That is based on the cut to keep DIS electrons of x>0.35
>
> > Will the updated rate table be available soon?
>
> We are working on that
>
> > Shouldn't we put the lead baffle results in the writeup?
>
> Quite right! After another discussion with Zhiwen earlier today, I
> realized this study read in the background for kryptonic baffle. Zhiwen and
> I are working on the lead baffle background now.
>
> Jin
>
> __________________________________________
>
> Jin HUANG
>
> Los Alamos National Laboratory
> PO Box 1663, MS H846, Los Alamos, NM 87545
>
> Office:(505) 665-2523, Cell:(757) 604-9946
> __________________________________________
>
>
>
> -----Original Message-----
> From: Xiaochao Zheng [mailto:xiaochao at jlab.org]
> Sent: Monday, September 09, 2013 11:52 AM
> To: jinhuang at jlab.org
> Cc: solid ec; solid daq; Zhiwen Zhao
> Subject: Re: [Solid_ec] 5th update on the PVDIS background
>
> Hi Jin:
>
> Thanks for your work. Two questions:
>
> In your plots you are using an up to 3.8 GeV threshold for the trigger
> curve. What is the effect on the electron rate and expected error?  Will
> the updated rate table be available soon?
>
> Shouldn't we put the lead baffle results in the writeup?
>
> Xiaochao
>
> ----- Original Message -----
> From: "Jin Huang" <jinhuang at jlab.org>
> To: "solid ec" <solid_ec at jlab.org>, "solid daq" <solid_daq at jlab.org>,
> "Zhiwen Zhao" <zwzhao at jlab.org>
> Sent: Sunday, September 8, 2013 9:42:10 PM
> Subject: [Solid_ec] 5th update on the PVDIS background
>
>
>
>
>
> Dear All,
>
>
>
> Thanks to Zhiwen to update the EC background with the "MORE1" baffle.
> Thereafter, the EC performance was simulated again as the fifth update on
> the PVDIS EC:
>
> ·
> https://userweb.jlab.org/~jinhuang/Meeting/2012.12.15%20SoLID%20Collaboration%20Meeting/UpdateOnPVIDSEC.pptx
>
> ·
> https://userweb.jlab.org/~jinhuang/Meeting/2012.12.15%20SoLID%20Collaboration%20Meeting/UpdateOnPVIDSEC.pdf
>
> In short, significant improvement in performance was observed. However,
> background is still strong for the inner radius region within the
> high-radiation azimuthal sectors, which is now dominated by photons.
> Downstream study from Zhiwen would quantify the new total trigger rate.
>
>
>
> All plots and their data points are saved to the SVN for the technical
> writeup. In particular, the trigger turn-on curves are saved to data file:
>
> ·
> https://solid.physics.umass.edu/svn/solid/solidtech/calorimeter/figs/Lead2X0PbBlock_Hex.1.PVDIS_RunALL_GetEfficiencies_Full_bgd_BackGround_Sept2013_Eklog_R_low_R0_ALL.rootTriggerSummarylow.root
>
> ·
> https://solid.physics.umass.edu/svn/solid/solidtech/calorimeter/figs/Lead2X0PbBlock_Hex.1.PVDIS_RunALL_GetEfficiencies_Full_bgd_BackGround_Sept2013_Eklog_R_high_R0_ALL.rootTriggerSummaryhigh.root
>
> The text for the writeup are not changed, pending decision on these plots.
>
>
>
> Cheers,
>
>
>
> Jin
>
>
>
>
>
> __________________________________________
>
>
>
> Jin HUANG
>
>
>
> Los Alamos National Laboratory
>
> PO Box 1663, MS H846, Los Alamos, NM 87545
>
>
>
> Office:(505) 665-2523, Cell:(757) 604-9946
>
> __________________________________________
>
>
>
>
>
> -----Original Message-----
> From: solid_daq-bounces at jlab.org [mailto:solid_daq-bounces at jlab.org] On
> Behalf Of Xiaochao Zheng
> Sent: Tuesday, September 03, 2013 8:42 PM
> To: solid ec; solid daq
> Subject: [Solid_daq] SoLID EC/DAQ meeting Wednesday 1-3pm
>
>
>
> Dear All:
>
>
>
> This is a reminder that we will have the EC/DAQ meeting tomorrow
> (Wednesday) from 1 to 3pm. I have reserved CC F228 for the meeting.
>
>
>
> The call-in instruction is as usual:
>
>
>
> US: 1-866-740-1260 International 303-248-0285
>
> passcode: 1066548
>
>
>
> Thanks,
>
>
>
> Xiaochao
>
>
>
>
> ----------------------------------------------------------------------------
>
> Associate Professor, Department of Physics, University of Virginia
>
> 382 McCormick Rd, Charlottesville, VA 22904
>
> Telephone: (434) 243-4032 (during academic year); or (757) 810-2885(summer)
>
> Homepage: http://people.virginia.edu/~xz5y/Main.html
>
>
> ----------------------------------------------------------------------------
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