Log entry time 03:36:02 on November 04, 2008

Entry number 246567

This entry is a followup to: 246566

Followups:

• 246584 11/04/08 06:06 Jin NMR Measurement, 49%

He3 cell is left in beam taking longitudinal data until 33.6% Pol. Then 

1. an NMR @ Pickup Location (Pol = 33.6%)
   https://www.jlab.org/~bbsoftw/TargetReports/GenericLog/NMRField_04-
11_02-25-29.html

2. rotate to trans+ direction

3. rise to optics location, NMR (cross calib, Pol. = 30.1%)
   https://www.jlab.org/~bbsoftw/TargetReports/GenericLog/NMRField_04-
11_02-43-14.html

4. lowered to beam location, NMR calibration 
   (Pol. = 2.13 %/mV x (X Channel Average Sweep Up/Down)
   https://www.jlab.org/~bbsoftw/TargetReports/GenericLog/NMRField_04-
11_02-46-07.html

5. Wait 30min, NMR shows (Pol. = 36.8%)
   https://www.jlab.org/~bbsoftw/TargetReports/GenericLog/NMRField_04-
11_03-16-53.html


---------------------------------
      Calibration Chain
---------------------------------


Using Calib of 47.65% Pol @ RF=long. , Pickup = Vertical, Target = 
Optics

X Channel Sweep Down = 22.0mV (Sweep up has distortion)

http://www.jlab.org/~adaq/halog/html/0811_archive/081103141754.html

----------------------------------

NMR Just after Pumping :

Target Position : Optics
RF Position : Long
Holding Field : Trans
Pumping Chamber Pick Up Coil : Vert

X Channel Sweep Down = 13.9mV

=> Pol = 30.1%

https://www.jlab.org/~bbsoftw/TargetReports/GenericLog/NMRField_04-
11_02-43-14.html

----------------------------------

Another immediate follow up NMR @ He3 Cell Location

Target Position : He3 Cell
RF Position : Long
Holding Field : Trans
Pumping Chamber Pick Up Coil : Vert

X Channel Average Sweep Up/Down = 14.1mV

https://www.jlab.org/~bbsoftw/TargetReports/GenericLog/NMRField_04-
11_02-46-07.html

----------------------------------

So calibration constant for 
He3 Cell Position
Trans Holding Field
Long RF
Vert Pickup 

Pol. = 2.13 %/mV x (X Channel Average Sweep Up/Down)