| Please note that all times are approximate |
| 0:00 | Beam still down, continuing from swing
shift. |
| Anomalous deadtime, under investigation. |
| 0:15 | Turned off FPP HV due to alarm. |
| 1:30 | MCC said beam was ready. Closed Hut doors, asked
for beam permit. |
| 1:58 | MCC asked to send tune beam. |
| 2:08 | Turned off E/dE/HAND HV due to alarms. |
| 2:35 | MCC asked to send CW beam, with no Compton. |
| 2:40 | 5 µA beam supplied to Hall. |
| 2:45 | Moved target to 4cm LH2 to start sieve optics
runs. |
| 3:05 | Low rate, asked MCC for 10 µA. |
| 3:20 | Realized low rate due to prescales not saved
properly. Runs 1876-1878 prescaled for T7, all junk. |
| 3:45 | Realized we didn't do beam check, moving back to
empty target to do so. |
| 3:50 | Asked MCC to do a harp scan and visual check on
beam dump. |
| 4:00 | MCC couldn't see beam at dump at 5 or 20 µA,
probably due to bad viewer. |
| 4:10 | Moved to BeO target, 5 µA, for visual
check. |
| 4:20 | Raster turned off, saw beam on BeO target, asked
for beam position change to 4A(-1.5,0), 4B(-3.5,2). |
| 4:30 | Beam centered. Started BeO run to check
rates. |
| 4:45 | Target masked to move to 4cm LH2. Raster returned
to 2x2 (6x4 MCC units). |
| 4:52 | Started first sieve optics run (1882). |
| 5:03 | Finished first run, moving to 4cm LD2. |
| 5:07 | Finished move, starting 4cm LD2 run. |
| 5:12 | Finished LD2 run, moving to optics target. |
| 5:22 | Moved to optics target, started run. |
| 5:39 | Finished optics target run, moving to LH2 for +2%
runs, changed magnet momentum. |
| 5:48 | Started LH2 run, decreased beam current to 2.5
µA to reduce deadtime, started new LH2 +2% optics run. |
| 5:55 | Moved to LD2 for optics run. |
| 6:09 | Moved to carbon foils. |
| 6:15 | Started carbon foil run. Also, energy lock
switched to Hall A. |
| 6:36 | Finished carbon foil run, moving to LH2 for ,
changed magnet momentum to 1.096 GeV/c. |
| 6:41 | Target moved, magnets set, changed prescales on T3
to 2, starting LH2 run. |
| 6:54 | Moving target to LD2. |
| 7:05 | Started LD2 run, PS3=2. |
| 7:14 | Moved to carbon foil, starting carbon foil options
run +0%. |
| 7:30 | Moved to BeO. |
| 7:49 | Moved to 4cm aluminum dummy target. |
| 8:00 | Passed off to Day Shift. |
| Run | Events | Time [mins] | Average Beam
Current | Deadtime [%] | Target | Comments |
| 1872 | 53989 | 2 | 0 | 35? | None | Cosmics,
Deadtime test run |
| 1873 | 75305 | 3 | 0 | 30? | None | Cosmics,
Deadtime test run |
| 1874 | Junk |
| 1875 | Junk |
| 1876 | 65397 | 2.5 | 0 | 31 | None | Cosmics,
Deadtime test run |
| 1877 | 5462 | 58?! | 5 | 0.75 | 4cm
LH2 | First attempt at sieve optics run. Incorrect prescales (T7 =
1, rest = 0), and it did not last 58 minutes. |
| 1878 | 1948 | 21 | 10 | 2.4 | 4cm
LH2 | Increased current to get higher rate, but higher rate of T7s.
D'oh! |
| 1879 | 279895 | 5 | 10 | 40 | 4cm
LH2 | Fixed prescales, got rate on LH2. |
| 1880 | 8669 | 15 | 5 | 7 | BeO | BeO
rates check, with raster on |
| 1881 | 10226 | 10 | 5 | 11 | BeO | BeO
rates check, raster off |
| 1882 | 30538 | 6 | 5 | 32 | 4cm
LH2 | Sieve Optics Run LH2 +4% |
| 1883 | 262687 | 5 | 5 | 32 | 4cm
LD2 | Sieve Optics Run LD2 +4% |
| 1884 | 291833 | 17 | 5 | 11.5 | Optics | Sieve
Optics Run Carbon Foils +4% |
| 1885 | 56107 | 1.3 | 5 | 57 | 4cm
LH2 | test run for rates |
| 1886 | 27622 | 6.8 | 2.5 | 26 | 4cm
LH2 | Sieve Optics Run LH2 +2% |
| 1887 | 392380 | 8.7 | 2.5 | 26 | 4cm LD2 | Sieve
Optics Run LD2 +2% |
| 1888 | 282607 | 21 | 2.5 | 10 | Optics | Sieve
Optics Run Carbon Foils +2% |
| 1889 | 355297 | 12 | 2.5 | 8 | 4cm
LH2 | Sieve Optics Run LH2 +0% |
| 1890 | 379224 | 14 | 2.5 | 10 | 4cm
LD2 | Sieve Optics Run LD2 +0% |
| 1891 | 3614 | 1 | 2.5 | 19 | Optics | Aborted
carbon foil run, wrong prescale |
| 1892 | 258709 | 15 | 2.5 | 13 | Optics | Sieve
Optics Run Carbon Foils +0% |
| 1893 | 133988 | 7 | 5 | 20 | BeO | Sieve
Optics Run BeO +0% |
| 1894 | 128540 | 6 | 5 | 20 | 4cm
Al dummy | Sieve Optics Run 4cm Al dummy+0% |