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

[Jin Huang]

> 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 



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Telephone: (434) 243-4032 (during academic year); or (757) 810-2885 (summer) 

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