Difference between revisions of "2022 JLAB REVIEW"

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2022 C1 Status Review of Tensor Spin Observables Experiments
 
  
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== Request to remove the C1 conditional to the b1 and Azz experiments==
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The C1 conditional status of the b1 and Azz experiments collaborations will be reviewed at Jefferson Lab on August 1, 2022. 
  
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Here is the conditional review panel [https://www.dropbox.com/s/os0gvga8lhiqs8d/TensorCharge.pdf?dl=0 Charge].
  
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[[File:Tensor polarization.png|thumb|500px|'''Figure 1:''' NMR measurement of tensor enhancement maximized by using two locations of ss-RF
 
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while rotating continuously at a fixed rate. The resulting tensor polarization was approximately
 
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36%]]
 
  
  
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b1 and Azz experiments were C1 conditional approved in PACs 41 and 44, respectively. The conditional requirement stayed: The experiment is conditionally approved with the condition that a tensor polarization of at least (close to) 30% be achieved and reliably demonstrated under experimental conditions.  
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'''The Conditional Review Report can be found here: [https://nuclear.unh.edu/~elong/docs/TensorFinalReport_final.pdf Final Report]'''
  
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The b1 and Azz collaborations ask the PAC 50 to remove the conditional from the experiments under the statement:
 
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''Recent developments in spin 1 enhanced tensor polarization have shown that a tensor polarization of at least (close to) 30% will be achieved under experimental conditions.''
 
  
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Figure 1 shows the NMR signal of about 36% tensor enhancement by using by using two locations of semi-saturating RF (ss-RF) while rotating the target cup continuously at a fixed rate.  The points corresponds to the measured data and the red line is the fulled fitted lineshape of the NMR spectra. The full lineshape is composed of the 1 → 0 (Blue) and 0  → -1 (pink) lines. 
 
  
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[https://hallcweb.jlab.org/wiki/images/8/86/Tensor_conditionals.pdf  Find the details to support the removal the C1 conditional to the b1 and Azz experiments here].
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== Review Meeting ==
  
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==Spin 1 Target Development ==
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'''Date:''' August 1, 2022
  
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{| class="wikitable"
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'''Time:''' 12:45 pm EST
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|-
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| Modeling alignment enhancement for solid polarized targets || https://arxiv.org/abs/1707.07065
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'''Room:''' F324-325 at CEBAF center
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|-
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|Enhanced tensor polarization in solid-state targets || https://arxiv.org/abs/2008.09515
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'''Remote connection:''' https://jlab-org.zoomgov.com/j/1618705690?pwd=SVFTVWcrQml2aU43azNTN0R0WTNhdz09
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|}
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'''Committee:'''  Chris Keith (chair), Josh Pierce, Rolf Ent
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== Agenda ==
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12:45 - 1:00: Executive session
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1:00 - 1:10: Intro/Overview, K. Slifer (10) [https://www.dropbox.com/s/x8u2v64cga2a19f/2022_slifer_tensor_review_2022_0731.pdf?dl=0 (pdf)]
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1:10 - 1:50: Discussions of the charges Pt. I, (Charges 1,2,3,4), D. Keller (30+10)[https://confluence.its.virginia.edu/display/twist/Group+Talks?preview=/13377818/107388205/TensorConditional_dk.pdf (pdf)]
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1:50 - 2:00: Coffee break
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2:00 - 2:40: Discussions of the charges Pt. II, (Charges 2,3), E. Long (30+10) [https://nuclear.unh.edu/~elong/talks/2022-08-01-ELong-TensorCond.pdf (pdf)] [https://nuclear.unh.edu/~elong/talks/2022-08-01-ELong-TensorCond.pptx (pptx)] [https://nuclear.unh.edu/~elong/technotes/T22-005.pdf (Related T20 technote)]
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2:40 - 2:55: Summary, S. N. Santiesteban (15) [https://hallcweb.jlab.org/wiki/images/7/7e/Summary_sns.pdf (pdf)]
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2:55 - 3:00: Coffee break
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3:00 - 4:00: Open discussion
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4:00 - 5:00: Executive session
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5:00: Closeout
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Below we briefly summarize the progress that has been made in addressing the conditional status.
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== Progress in Tensor Enhancement==
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[[Image:Tensor polarization.png|center|thumb|800px|'''Figure 1.''' (Left) NMR spectra after ss-RF and target rotation resulting in a tensor polarization of 36.5+-3.5%. (Right) Vector and tensor polarizations with respect to the dose in beam. The vertical line indicates when annealing will be performed in the target.  ]]
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The b1 and Azz experiments were C1 conditionally approved by PACs 41&44, respectively, with the requirement that: "''a tensor polarization of at least (close to) 30% be achieved and reliably demonstrated under experimental conditions.''"  Links to the PAC reviews are provided below.  Our collaboration has recently demonstrated that a tensor polarization of at least 30% will be achieved under experimental conditions. 
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So '''we request Jefferson Lab to fully approve these two experiments'''.
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[https://hallcweb.jlab.org/wiki/images/8/86/Tensor_conditionals.pdf The details supporting our request to remove the C1 conditionals are available here].
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As a brief summary, the <B>left panel</B> of the figure above shows tensor enhancement using the technique of semi-saturating RF (ss-RF) with continuous rotation of the target material.  The points corresponds to the measured NMR data and the red line is the lineshape fit of the NMR spectra.  This fit was used to extract the tensor polarization value of 36+-3.5%. The full lineshape is composed of the magnetic sublevel transitions m=1 → 0 (Blue) and m=0  → -1 (pink) lines.  The <B>right panel</B> of the figure shows the predicted vector and tensor enhanced polarizations as a function of accumulated dose during experimental conditions.  The vertical dotted line indicates the dose at which an anneal will be performed in order to keep the overall tensor polarization at 30%. Full details for these plots and supporting documentation is provided in the links on this wikipage.
  
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==PAC Results ==
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==Recent Tensor Enhancement Papers by the Collaboration ==
  
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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! Experiment !! Title !! Scientific Rate !! PAC Decision !! PAC Results !! Condition
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| Modeling alignment enhancement for solid polarized targets || [https://link.springer.com/article/10.1140/epja/i2017-12344-0 Eur. Phys. J. A 53, 155 (2017)] [https://arxiv.org/abs/1707.07065 (arXiv)]
 
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| b1 || The Deuteron Tensor Structure Function b1 || A- || C1 || https://www.jlab.org/exp_prog/PACpage/PAC40/PAC40_Final_Report.pdf || The experiment is conditionally approved with the condition that a tensor polarization of at least 30% be achieved and reliably demonstrated under experimental conditions.
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|Enhanced tensor polarization in solid-state targets || [https://www.sciencedirect.com/science/article/pii/S0168900220309013 NIM A 981, 164504 (2020)] [https://arxiv.org/abs/2008.09515 (arXiv)]
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|-
 
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| Azz || Measurements of the Quasi-Elastic and Elastic Deuteron Tensor Asymmetries  || A- || C1 || https://www.jlab.org/exp_prog/PACpage/PAC44/PAC44%20Report_FINAL.pdf || The experiment is conditionally approved with the condition that a tensor polarization of close to 30% be achieved and reliably demonstrated under experimental conditions.
 
 
|}
 
|}
  
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==Full Proposals ==
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==Experiment Information ==
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{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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! Experiment !! Proposal
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! Experiment !! Scientific Rate !! PAC Decision !! PAC Results
 
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| b1 || https://www.jlab.org/exp_prog/proposals/13/PR12-13-011.pdf
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| The Deuteron Tensor Structure Function b1 [https://www.jlab.org/exp_prog/proposals/13/PR12-13-011.pdf (pdf)] || A- || C1 || [https://www.jlab.org/exp_prog/PACpage/PAC40/PAC40_Final_Report.pdf link]
 
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| Azz || https://www.jlab.org/exp_prog/proposals/15/PR12-15-005.pdf
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| Measurements of the Quasi-Elastic and Elastic Deuteron Tensor Asymmetries [https://www.jlab.org/exp_prog/proposals/15/PR12-15-005.pdf (pdf)] || A- || C1 || [https://www.jlab.org/exp_prog/PACpage/PAC44/PAC44%20Report_FINAL.pdf link]
 
|}
 
|}

Latest revision as of 15:11, 19 October 2023


The C1 conditional status of the b1 and Azz experiments collaborations will be reviewed at Jefferson Lab on August 1, 2022.

Here is the conditional review panel Charge.


The Conditional Review Report can be found here: Final Report


Review Meeting

Date: August 1, 2022

Time: 12:45 pm EST

Room: F324-325 at CEBAF center

Remote connection: https://jlab-org.zoomgov.com/j/1618705690?pwd=SVFTVWcrQml2aU43azNTN0R0WTNhdz09

Committee: Chris Keith (chair), Josh Pierce, Rolf Ent

Agenda

12:45 - 1:00: Executive session

1:00 - 1:10: Intro/Overview, K. Slifer (10) (pdf)

1:10 - 1:50: Discussions of the charges Pt. I, (Charges 1,2,3,4), D. Keller (30+10)(pdf)

1:50 - 2:00: Coffee break

2:00 - 2:40: Discussions of the charges Pt. II, (Charges 2,3), E. Long (30+10) (pdf) (pptx) (Related T20 technote)

2:40 - 2:55: Summary, S. N. Santiesteban (15) (pdf)

2:55 - 3:00: Coffee break

3:00 - 4:00: Open discussion

4:00 - 5:00: Executive session

5:00: Closeout


Below we briefly summarize the progress that has been made in addressing the conditional status.

Progress in Tensor Enhancement

Figure 1. (Left) NMR spectra after ss-RF and target rotation resulting in a tensor polarization of 36.5+-3.5%. (Right) Vector and tensor polarizations with respect to the dose in beam. The vertical line indicates when annealing will be performed in the target.


The b1 and Azz experiments were C1 conditionally approved by PACs 41&44, respectively, with the requirement that: "a tensor polarization of at least (close to) 30% be achieved and reliably demonstrated under experimental conditions." Links to the PAC reviews are provided below. Our collaboration has recently demonstrated that a tensor polarization of at least 30% will be achieved under experimental conditions. So we request Jefferson Lab to fully approve these two experiments.

The details supporting our request to remove the C1 conditionals are available here.

As a brief summary, the left panel of the figure above shows tensor enhancement using the technique of semi-saturating RF (ss-RF) with continuous rotation of the target material. The points corresponds to the measured NMR data and the red line is the lineshape fit of the NMR spectra. This fit was used to extract the tensor polarization value of 36+-3.5%. The full lineshape is composed of the magnetic sublevel transitions m=1 → 0 (Blue) and m=0 → -1 (pink) lines. The right panel of the figure shows the predicted vector and tensor enhanced polarizations as a function of accumulated dose during experimental conditions. The vertical dotted line indicates the dose at which an anneal will be performed in order to keep the overall tensor polarization at 30%. Full details for these plots and supporting documentation is provided in the links on this wikipage.

Recent Tensor Enhancement Papers by the Collaboration

Modeling alignment enhancement for solid polarized targets Eur. Phys. J. A 53, 155 (2017) (arXiv)
Enhanced tensor polarization in solid-state targets NIM A 981, 164504 (2020) (arXiv)

Experiment Information

Experiment Scientific Rate PAC Decision PAC Results
The Deuteron Tensor Structure Function b1 (pdf) A- C1 link
Measurements of the Quasi-Elastic and Elastic Deuteron Tensor Asymmetries (pdf) A- C1 link
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