[Poltarg12] no meeting March 5

[Christopher Keith]

Hey Targeteers,

For a variety of reasons, there will not be a target meeting tomorrow, 
Thursday March 5.  For those interested, here's a quick update:


- James Brock has been analyzing the refrigerator performance from the 
last cool-down. He'll give an update at the next meeting, in April.

- The techs have been transferring various electronics and gas piping 
from standard 19" racks in the EEL onto the upper portion of the target 
cart that will be utilized in Hall B.  Our plan is to mount the 
refrigerator onto this cart in the coming weeks and use it during the 
next cool-down this summer;

- The Target Group's new designer, Casey Flanagan, is working on the 
lower portion of the target cart.  This is where all the vacuum pumps 
and vacuum piping for the target will reside.  Once the design is 
complete, we'll start fabrication;

- Hai Dong is designing and programming a new FPGA-based 
control/amplifier board for the next generation NMR q-meter.  This 
should be ready for the next cool-down in the summer;

- Victoria discovered why the FROST solenoid has quenched during the 
last two cool-downs: a ramp rate programmed into its power supply was 
slightly too high;

- Victoria is using OPERA to model NMR coils.  Hopefully, the "optimal" 
coil(s) will be ready for the summer tests;

- A significant number of cryostat parts are under design by James 
Brock.  These will replace the prototypes that have been used for our 
EEL tests, and are required to actually use the system in Hall B;

- Members of the RGC collaboration are working furiously to decide the 
optimum target length for the first round of experiments.  The deadline 
for this decision is October 1, 2020.

- Marco B. formed a "Hall B Polarized Target Taskforce" consisting of 
Eugene Pasyuk, Volker Burkert, Bob Miller, Xiangdong Wei, James Maxwell, 
and myself.  We held the first meeting on Monday.  The deliverable will 
be a two-page report detailing the status of the longitudinal ammonia 
target, polarized gas 3He target, transverse HDice, and possible 
substitutes for the latter.


I think that's it.

cdk

-- 
______________________________________________________
Christopher D. Keith, PhD
Jefferson Lab, Suite 6          email: ckeith at jlab.org
12000 Jefferson Ave.            ph: 757-269-5878
Newport News VA 23606           fax: 757-269-5235
______________________________________________________

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