[dsg-hdice] Please help me to login the HDice rack 1 computer

[Amanda Hoebel]

Hi Xiangdong, 

Would you be able to meet with me in the HDIce lab to discuss the program? 

Regards, 
Amanda 



From: "Xiangdong Wei" <xwei at jlab.org> 
To: "Amanda Hoebel" <amandah at jlab.org> 
Cc: dsg-hdice at jlab.org, "Patrizia Rossi" <rossi at jlab.org> 
Sent: Wednesday, September 12, 2018 2:28:53 PM 
Subject: Re: [dsg-hdice] Please help me to login the HDice rack 1 computer 

Hi Amanda, 

PD is at 4.2 Kelvin with testing target installed in the sample space. After reconfigured the magnet power supply leads with CT Box, I started to test the newly upgraded NMR Rack 1. 

The full test requires both Fast Resonance Scan and NMR Program functioning. 

The FRS scan failed to produce correct spectrum, shown as in attached picture IMG_3644.jpg. The left panel was at -25dBm and the right was at -63dBm. The NMR coil response should look like the left panel of attached picture IMG_3643.jpg, obtained from Rack 2. For comparison, the Rack 1 results was shown on the right. Looking deeper, one can find that the RF amplitude from the Rack 2 was two order of magnitude lower than from Rack 1. This means that the RF switch box failed to deliver RF. 

I remember that the Rack 2 had the same kind of problem when we first got it and you fix that in a short time. Could you take a look at it soon? 

Thank you very much. 

Best regards, 

Xiangdong 


Xiangdong Wei 

x-5266 


From: "Amanda Hoebel" <amandah at jlab.org> 
To: dsg-hdice at jlab.org 
Cc: "Patrizia Rossi" <rossi at jlab.org> 
Sent: Wednesday, September 5, 2018 11:13:20 AM 
Subject: Re: [dsg-hdice] Please help me to login the HDice rack 1 computer 

Hi Xiangdong, 

I logged into Rack 1 and there does not appear to be anymore updates that are required. 

The Rack 2 computer was built differently than the Rack 1 computer. The Rack 1 computer was built by the computer center and will require them to create a general account that can be used by that computer. The Rack 1 computer will not need to have the DSG login, as we can use the HDIce login account when the computer center sets it up. 

Regards, 
Amanda 


From: "Xiangdong Wei" <xwei at jlab.org> 
To: "Amanda Hoebel" <amandah at jlab.org> 
Cc: dsg-hdice at jlab.org 
Sent: Tuesday, September 4, 2018 3:31:00 PM 
Subject: Please help me to login the HDice rack 1 computer 

Hi Amanda, 

Would you please help me to login the HDice Rack 1 computer and finish the windows' update? 

After finishing the updates, I'll contact IT group to change the login mode so the HDice group can access the computer after each reboot. 

Since the DSG setup the Rack 2 computer with two login accounts, DSG and HDice, and it has been worked ever since, is that easier for the DSG to setup the Rack 1 computer the same way so the HDice group can swap those two racks smoothly? Could you revisit this issue? 

Thanks again for your help. 

Best regards, 

Xiangdong 



Xiangdong Wei 

x-5266 


From: "Xiangdong Wei" <xwei at jlab.org> 
To: "Amanda Hoebel" <amandah at jlab.org> 
Cc: dsg-hdice at jlab.org 
Sent: Tuesday, August 14, 2018 10:57:45 AM 
Subject: Re: [dsg-hdice] NMR averaging and standard deviation 

Hi Amanda, 

Thank you very much for the message, I'll start playing the new rack with the CT-Box. Could you please send the data file for the two attached plots so I can do further analysis? As soon as we cool down the PD-I (in ~1 week), I will measuring the NMR the new rack. 

There is one setback: 

When preparing the PD-I in HDice lab yesterday morning, I noticed that the display of control computer on the new NMR rack was black. After stroking the SHIFT Key, the infamous Windows Blue Screen shown up, indicating a computer crash (see the attached picture IMG_3503). 

As you mentioned 2 weeks ago, this computer requires the smart card to login (see attached picture IMG_3504), so I'm stuck and need your help. 

Would you please: 
1). Investigate what caused the crash? 
2). Change the login settings to USING PASSWORD, so we (the HDice group) can get access to the computer all the time, especially in the night, weekends and holidays, to measure the target polarizations while on shift? Given the long and complicated target production process, the reliability and accessibility of the NMR rack are extremely important, which sometimes can become the only factor for saving the target. 

Thanks again for the efforts you and the DSG group spent on this project, we will always count on your support. 

Best regards, 

Xiangdong 


Xiangdong Wei 

x-5266 


From: "Amanda Hoebel" <amandah at jlab.org> 
To: dsg-hdice at jlab.org 
Sent: Monday, August 13, 2018 2:05:37 PM 
Subject: [dsg-hdice] NMR averaging and standard deviation 

Hi Xiangdong, 

Averaging was implemented for the CT-box field values in the NMR program and is ready to be tested. The program was run for 1,000 cycles and the standard deviation of the field values was analyzed. Attached is a zoomed-in picture of a part of the average field values, showing the respective points' standard deviation over the 1,000 cycles. The average standard deviation was 0.55 G. 

Regards, 
Amanda 

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