Make New Entry, Make Followup Entry
User name Jin Huang
Log entry time 05:18:44 on November 12, 2008
Entry number 248345
This entry is a followup to: 248340
keyword=Beam Tuning for Reference cell runAfter BeO Spot check and Carbon with Hole test (Halog # 248296, @ BPM A(1.5,1) B(0 1) ), We did a couple test with beam tuning on ref cell. The conclusion is the best beam position on ref cell we have is BPM A(1.0,1.3) B(-1.5 1), and it's safe to goto 4x5 without any hitting on the cell wall.
Therefore, we are going to have tonight's ref cell run go with BPM A(1.0,1.3) B(-1.5 1), raster 3x4.
Test Summary Table
| MCC Raster | T1 | T3 | run # | BPM | Hot Spots Pos (On rastxy) |
| ->Vacuum Ref Cell, 2uA | |||||
| 3x3 | 8.50E+03 | 2.00E+02 | 3266 | A(1.5,1) B(0 1) | Left-Top |
| 2.5x3 | 8.40E+03 | 1.80E+02 | 3267 | A(1.5,1) B(0 1) | Little on Left-Top |
| 3x3 | 9.00E+03 | 2.50E+02 | 3268 | A(1.5,1) B(0 1) | Left-Top |
| 4x4 | 2.20E+04 | 1.60E+03 | 3269 | A(1.5,1) B(0 1) | Huge Hot Spot Left-Top |
| 2.5x3 | 7.50E+03 | 1.60E+02 | 3270 | A(1.5,1) B(-0.5 1) | Vert Faint Left-Top |
| 2.5x3 | 7.70E+03 | ... | 3271 | A(1.1,1.3) B(-1 1) | None |
| 3x4 | 7.50E+03 | 1.60E+02 | 3272 | A(1.1,1.3) B(-1 1) | None |
| 4x5 | 7.70E+03 | 1.60E+02 | 3273 | A(1.1,1.3) B(-1 1) | Little on Left-Top |
| 4x5 | 7.80E+03 | 1.70E+02 | 3274 | A(1.1,1.3) B(-1.4 1) | None |
| 5x6 | 8.00E+03 | 2.10E+02 | 3275 | A(1.0,1.3) B(-1.5 1) | Left-Top, Right-Top, Right-Bottom |
| ->Carbon with Hole, 5uA | |||||
| 5x6 | 4.60E+04 | 4.50E+02 | 3276 | A(1.0,1.3) B(-1.5 1) | Get Whole, See Halog #248340 |
| ->BeO. Spot is centered (See cam shot below) | |||||
A copy of this log entry has been emailed to: camsonne@jlab.org
Spot on BeO for BPM A(1.0,1.3) B(-1.5 1)