Difference between revisions of "HYP Target Meeting 20210427"
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<font size="5">Target Meeting (HRS-HKS experiment at JLab Hall A) </font> | <font size="5">Target Meeting (HRS-HKS experiment at JLab Hall A) </font> | ||
| − | * 21:00- on April 26, 2021 EDT (10:00- on April 27, 2021 JST) | + | * 21:00-21:30 on April 26, 2021 EDT (10:00-10:30 on April 27, 2021 JST) |
| − | * Participants: David Meekins, Toshiyuki Gogami | + | * Participants: David Meekins (JLab), Toshiyuki Gogami (Kyoto Univ.) |
* via BlueJeans | * via BlueJeans | ||
=Discussion= | =Discussion= | ||
| − | * | + | * The idea to increase the density of helium gas targets |
| − | * | + | ** 1. Take out the hydrogen gas target (it is expected to take a few hours) <br> 2. Cool down the helium gas targets at twelve kelvin for physics runs. |
| + | ** The density of the helium gas could be increased by a factor of 3.5 (the thickness of 75 mg/cm<sup>2</sup> changes to 260 mg/cm<sup>2</sup>) | ||
| + | ** Dave will summarize the estimations in the proposal. <br> → Toshi will consider to change the beam intensity or beamtime to optimize the experiment. | ||
| + | |||
| + | * Raster | ||
| + | ** Raster of 2 × 2 mm<sup>2</sup> is assumed. | ||
| + | ** It can be 0.5 × 0.5 mm<sup>2</sup>, but the density reduction effect will be larger. | ||
| + | |||
| + | * Density reduction during the beam exposure | ||
| + | ** A 40% reduction may be occurred at 50 uA. | ||
| + | ** The density reduction of 50% is assumed in the current proposal. | ||
| + | |||
| + | |||
| + | <br><br> | ||
| + | <hr> | ||
| + | [[HYP_HRS-HKS|Back to home]] | ||
Latest revision as of 22:09, 26 April 2021
Target Meeting (HRS-HKS experiment at JLab Hall A)
- 21:00-21:30 on April 26, 2021 EDT (10:00-10:30 on April 27, 2021 JST)
- Participants: David Meekins (JLab), Toshiyuki Gogami (Kyoto Univ.)
- via BlueJeans
Discussion
- The idea to increase the density of helium gas targets
- 1. Take out the hydrogen gas target (it is expected to take a few hours)
2. Cool down the helium gas targets at twelve kelvin for physics runs. - The density of the helium gas could be increased by a factor of 3.5 (the thickness of 75 mg/cm2 changes to 260 mg/cm2)
- Dave will summarize the estimations in the proposal.
→ Toshi will consider to change the beam intensity or beamtime to optimize the experiment.
- 1. Take out the hydrogen gas target (it is expected to take a few hours)
- Raster
- Raster of 2 × 2 mm2 is assumed.
- It can be 0.5 × 0.5 mm2, but the density reduction effect will be larger.
- Density reduction during the beam exposure
- A 40% reduction may be occurred at 50 uA.
- The density reduction of 50% is assumed in the current proposal.