Difference between revisions of "Run Plan"

Latest revision as of 11:04, 6 January 2011

Calibration

• Tune beam to 1 pass, Set HRSL(-) and HRSR(-) at 15 (-15) deg.

1. HRSs calibration with C(e,e') (elastic) with/ without sieves.

• Move HRS(R) to 12.5 deg change polarity to HRSR(+), Set BigBite at 68 Deg.

2. Momentum scane for BigBite calibration, H(e,e'p) Kin A 1,2,3.

• Energy change 1 pass to 2 pass.

3. Continue calibration of BigBite H(e,e'p), D(e,e'p) and C(e,e'p) Kin A 4,5, B 1,2,3,4 and C1

• Move BigBite to backward angle (should allow HRSR at ~70 deg)

• Put the Neutron array (without the lead wall) at 50 Deg and 15 meters from target.

4. Calibration of the HAND with H(e,e'p) Kin D1.

5. Continue calibration of HRSs with quasi elastic scattering C(e,e'p) Kin G 1,2.

• Put the BigBite at 99 Deg (magnet on detector off) and HAND behind and install lead wall. Switch the polarity of HRSs to HRSL(+) and HRSR(-).

6. Continue calibration of HRSs with quasi elastic scattering C(e,e'p) Kin G 3,4

7. HAND neutron efficiency calibration.Kin E 1,2.

End of Calibration

Production

• Tune beam to 4 pass, switch HRSs polarity to HRSL(-) and HRSR(+).

• Singles rates study

8. D(e,e'pn), Establish triple coincidence at x>1 (Kin Pmiss = 500 MeV/c)

• Run for 2 calendar days, Q=1 C - expected ~100 events in the d(e,e'pn) TOF peak, (see E01-015 previous measurement, for 4 cm LD2 target at 10 uA). Should be able to identify the TOF n peak at the known location ~ 40 events after a day of running: a check for x>1 timing etc.

9. 4He(e,e'pp)/(e,e'pn), production, Pmiss = 500 MeV/c Kin K2

10. 4He(e,e'pp)/(e,e'pn), production, Pmiss = 625 MeV/c Kin K3

11. 4He(e,e'pp)/(e,e'pn), production, Pmiss = 755 MeV/c Kin K4

12. 4He(e,e'pp)/(e,e'pn), production, Pmiss = 875 MeV/c Kin K5

13. 4He(e,e'pp)/(e,e'pn), production, Pmiss = 400 MeV/c Kin K1