Ameya Kolarkar

Research Associate Boston University (homepage) Dept of Physics, PRB-363 Phones: 617-353-xxxx   Office :   9884   Lab  :   ???? Pager: (757)584-5751 Email: my last name at JLab!

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GEn Analysis Log

[ Target Log ]   [ Analysis Log ]   [ Noteworthy Notes and Troubleshooting ]   
[ NMR ]   [ EPR ]   [ Magnetics ]   [ Lasers and Optics ]   
[ Density ]   [ Talks ]   [ Photos ]   [ N20 ]   [ DAQ ]

[ Hall A Webpage ]   [ Hall A Electronic Log ]   [ GEn Wiki ]

Target Lab

• Electronics/Equipment Inventory. In use in the lab, and spares as of early 2005.
• Polarized ³He web site at Jlab. An overview.
• Polarized ³He target system. Information about system, experiments and collaborations.


• Here's where I put together my hardware experience on the target for the GEn experiment. Let me know of any mistakes or if more clarification is needed. Here is the document in PS and PDF formats.


• NMR.
• Data analysis. Has all the files required and the explanation to use them.
• Frequency Sweep NMRNuclear Magnetic Resonance page. The AFP condition is derived here [pdf]. Note: It follows Abragam [1] in it's early stages
• The NMR cabling. [ps]
• Frequency Sweep Water NMR plot [ps] at Kentucky (only 10 sweeps!!).


• EPR.
  • The latest EPRs on the hybrid cell Carlos: K; Rb. These were both done at 230°C, ~26.65G holding field.
  • Here are all the EPR plots from my study here.
  • First EPRElectron Paramagnetic Resonance in the new target lab!
  • Here's the latest K-Rb hybrid EPRHybrid EPR is when the K is depolarized and D2 line from the Rb is observed plot [ps], at 225^oC and about 23MHz frequency (from Kentucky).
  
  
• Magnetics.
• Take a look at the magnetic compass document and give me suggestions. This document is due for some updating ... (9/5)
• Here are the images/pictures of the compass measurements.
• Vertical Compass: See the development of the verticomp - the magnetic compass to measure vertical magnetic field direction - here.


• Optics and Lasers. The optical setup used thus far does not work very well with the five-to-one combiner (henceforth referred to as the combiner) - the beams diverge after passing through the lens. One of the solutions to this problem involves the use of two lenses, and was studied at UVa.
  • Gaussian beam parameters plot [ps] for one of the combiner configuration - FAP system -> 75m fiber -> combiner. It shows the beam waist diameter (in inches) versus the distance (in inches) from the bi-convex lens which is at a distance of 45mm from the fiber output. The "0" of the x-axis corresponds to 80mm from the combiner.
  • Results of the simulations ... coming up/
  • Information on the lasers in the target lab.
  
  
• Density.
• Here are a few plots of density measurements done at Ky in Fall 2002.


• Talks.
• Talk at the July 22, 2005 Polarized helium-3 Collaboration Meeting.
• DNP 2006 Talk


• Photos are here.

Analysis

• The G_EⁿNeutron Electric Form Factor Experiment homepage. Now has a new look!!
• The Scaler Analysis website.
• N20 Analysis: A few notes I put together for the TDCTime to Digital Converter analysis.
• My TDC rates calculation codes are here: TDC_veto_table.C (veto), TDC_n20_table.C (neutron detectors). The rate is displayed in the corresponding TPad, and also in the terminal window. It outputs the rates in table form as a LaTeX file.
• Results (very basic) of the TDC and scalar analysis. TDC analysis for all the runs is now complete. Take a look. The detector map with rates is here.
• DAQ. Here's the G0 helicity structure to be used in the GEn experiment. I'll put in the description when I get time.
• RF Timing Analysis. Here's some RF timing and other stuff.

References: