Discussion

Target list (only solid targets for the next run)

E12-15-008: ⁴⁰Ca, ⁴⁸Ca (150 mg/cm²)
- 40 is easy to obtain, but not for 48.
- Dave asked Oak Ridge National Lab. to purchase the Ca material.
  → No response yet.
  → Dave will contact the Lab.
E12-20-013: ²⁰⁸Pb (100-150 mg/cm²)
- The thickness needs to be fixed for design.
- Cryogenic system is likely to be needed for cooling.
- ∼20 μA would be OK to apply.
Common calibration: ¹²C (150 mg/cm²), CH₂ (500 mg/cm²), ²⁷Al (150 mg/cm²)

LOI12-23-013: ⁶Li, ⁹Be, ¹¹B (100 mg/cm²)
- A 90%-level of purity is easy to obtain for ⁶Li.
  → The Li material with a better purity is possible to prepare but it costs more.
- B₄C is easier to obtain than a pure B.
  B₄C would be OK, but the pure B is much better in terms of spectroscopy.
LOI12-23-016: ²⁷Al (100 mg/cm²)
LOI12-23-011: there may be special needs.

Solid targets are planned to be used for the next run.
But, the target system should be compatible with gas targets (E12-19-002) to save total manpower and cost.
ERR, for example, in Mar is possible for the (solid) target part.
Requirements for the target (position accuracy etc.) need to be summarized.
Target camera
→ Beam position adjustment by using a carbon-hole target is more standard nowadays.
The target group will work on a scattering chamber as well.
Let's keep using MS Sharepoint for sharing information and documents.

13:00 p.m.- on Nov 14, 2022 (EDT) at JLab.
→ Meeting for Hypernuclear ERR