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Target Lab. Update

Transversity. Target Lab. Update. Xiaohui/Joe/Yi/Chiranjib. Transversity Collaboration Meeting Monday July 9 th 2007. Issues :::. Oven related Laser Optics Cell Other Compass. Oven/support structure :::. New oven being tested on temporary structures

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Target Lab. Update

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  1. Transversity Target Lab. Update Xiaohui/Joe/Yi/Chiranjib Transversity Collaboration Meeting Monday July 9th 2007

  2. Issues ::: • Oven related • Laser • Optics • Cell • Other • Compass

  3. Oven/support structure ::: • New oven being tested on temporary structures • Successfully heated up to 240 degree C • One of the support parts got burnt • New piece being made in machine shop • New support structure ( air inlet/outlet pipe) shortly • Concern about the present oven weight • A completely new ovenwith lighter material being given a thought Thanks Al /Susan

  4. Oven/support structure::: Temporary insulation RTV to block leakage GeN tube

  5. Oven/support structure ::: Burned portion due to leakage The support stand could not sustain high temp.

  6. Laser ::: • 6 single FAPs and 2 duo FAPs • All tested/recalibrated • One to be sent for repair • GOOD NEWS:::: Coherent decided to resume production • 3 new FAPs being ordered

  7. Optics ::: • All 75 m (10 new/6 old) fiber tested • All good/ready to be installed in the Hall • 5 to 1 combiners( 3)arriving shortly • Gaussian Beam Parameters (GBP) measured GBP s are beam waist,beam waist position and the divergence essential inputs for our simulation to have the effective pumping!!!! • Simulation for the three optics lines being done • Almost all components for optics lines identified • Components to be ordered shortly Thanks Susan

  8. He-3 Cell Update ::: • 8 cells filled (4 @ W&M and 4 @ UVA) • From UVA::::::: Antoinette,Samantha,Stephanie,Boris 3 of them ---3 inch Density 7.5 amg (He-3) Alkali mix ratio => K:Rb::5:1 90 Torr/0.11 amg Nitrogen More update from W&M :::: Todd/Joe

  9. Other ::: • New pick up coils/stands ready • All software ( new/modified codes) waiting to be tested • Density measurements being done on one new cell from W&M • BB field mapping to be done before BB moves to HALL C • New Vertical coils are here • Support structure installed in the new target lab. • Alignment / mapping to be done shortly

  10. From the new target lab. ::: Vertical coil test structure in the new target lab. The height is about 7.8 ft

  11. Compass from UKY(Wolfgang et al.) • After a lot of struggle , the vertical compass now made to work • Turns out to be extremely difficult project • Resolution verified to be 0.09 degrees • Plan to achieve 0.05 degrees • Calibration to be done shortly, waiting on a component from the machine shop • Customization to be done when it arrives @ Jlab.

  12. The compass ::: To the comp. Air inlet Magnet Rotating disc

  13. Clean the lab…..start laser alignment….depending upon the oven and support structures,few more tests on the oven….start pumping….the polarimetry tests follow Density measurements to be carried on as new cells arrive on regular basis Even though due to the oven structure issues we are 3 weeks behind our schedule, we plan to finish up all the required tests etc. by Oct./Nov. to meet the Jan 1st deadline so called“PLANS” :::

  14. Acknowledgment Many thanks to Wolfgang,Jian Ping,Todd, Jaideep,Aidan,Ameya Next time we promise to show some results with some fancy plots !! Thanks !!

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