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    User name Yoomin

    Log entry time 08:08:32 on December16,2007

    Entry number 221419

    keyword=Owl Shift Summary

    Owl Shift Summary

    00:00 Both collimators open, ask beam of 5uA
    01:15 50uA beam for sieved collimator
    01:33 Optics -4% setting on R-HRS done. R-HRS optics complete.
    01:35 R-HRS p0 starts changing to 736.473 MeV/c, preparing for energy measurement
    01:55 R-HRS angle changes to 15degree
    02:26 L-HRS -4% setting for optics and NaI HV scan complete.
    02:27 L-HRS p0 set to 420MeV/c
    03:28 L-HRS p0 set to 100MeV/c
    04:20 NaI HV scan complete. Start changing momentum to 736.473MeV, and angle to 15degree
    HV restored to original value in "december-15-712MeV.txt"
    04:45 Energy measurement runs start on both HRS.
    05:45 e0 measurement at 15 degree p0=736.473MeV/c complete, angles change to 35deg, p0 to 725.959MeV/c
    06:10 e0 measurement at 35 degree p0=725.959MeV/c starts with 20uA
    06:37 Beam off, MCC says they've got something to do on the raster, and this takes about 5-10 minutes.
    06:49 Beam back
    07:30 measurement at 15 degree p0=725.959MeV/c complete, angles change to 45deg, p0 to 718.314MeV/c
    07:55 e0 measurement at 35 degree p0=718.314MeV/c starts with 50uA on Fe target


    Run List

    Optics and L-HRS NaI HV scan

    -2%: p0=720.433 MeV/c
    L-HRS
    4075 00:12-00:19 1M Open Collimator
    4076 00:24-00:30 1M HV scan -200V
    4077 00:32-00:39 1M HV scan -100V
    4078 00:40-00:48 1M HV scan -50V
    4079 00:50-00:57 1M HV scan +50V
    4080 00:58-01:05 1M HV scan +100V
    4081 01:06-01:12 1M HV scan 0V
    -2% done.

    -4%: p0=705.731 MeV/c
    L-HRS
    4082 01:26-01:43 1.5M Sieve Slit
    4083 01:48-01:54 1M Open collimator, HV scan 0V
    4084 01:56-02:01 1M HV scan -200V
    4085 02:01-02:06 1M HV scan -100V
    4086 02:07-02:13 1M HV scan -50V
    4087 02:15-02:20 1M HV scan +50V
    4088 02:21-02:26 1M HV scan +100V

    R-HRS
    21978 00:40-00:47 1M Open Collimator
    21979 Junk run
    21980 00:55-01:15 1.5M Sieve slit(5uA, rate is low)
    21981 01:16-01:33 1.5M Sieve slit(50uA) ~1.5M
    -4% done

    L-HRS NaI HV scan only (1M events each)
    p0=420 MeV/c
    4089 02:36-02:46 0V, 5uA
    4090 02:48-02:55 -200V, 10uA
    4091 02:57-03:03 -100V
    4092 03:05-03:12 -50V
    4093 03:13-03:20 +50V
    4094 03:21-03:28 +100V
    p0=100 MeV/c
    4095 03:41-03:47 0V
    4096 03:48-03:54 -200V
    4097 03:55-04:00 -100V
    4098 04:01-04:07 -50V
    4099 04:08-04:13 +50V
    4100 04:14-04:20 +100V
    NaI HV scan done.

    Energy Measurement
    736.473 MeV/c, 15degree, 5uA
    56Fe : 4101, 21982 04:46-04:51 ~1.2M
    12C : 4102, 21983 04:55-05:00 ~1.4M
    Dummy : 4103, 21984 05:06-05:11 ~1.5M
    208Pb : 4104, 21985 05:21-05:28 ~2.0M
    4He : 4105, 21986 05:37-05:44 ~2.0M
    725.959 MeV/c, 35degree, 20uA
    4He : 4106, 21987 06:10-06:18 ~1.0M
    208Pb : 4107, 21988 06:26-06:37 ~0.4M
    Dummy : 4108, 21989 06:50-07:00 ~1.1M
    12C : 4109, 21990 07:06-07:16 ~500k
    56Fe : 4110, 21991 07:20-07:30 ~800k(R-HRS dipole readback failed during the run R-HRS events=280k)
    718.314 MeV/c, 45degree
    56Fe : 4111, 21992 07:55-08:05 ~300k,60k