BABAR Aperture Scan Experiment - 05 March 2007

This page is an entry point for more information about the Machine Detector Interface Activities.

Aperture scan goal and procedure:

Sub-Detectors Analysis:

• MD Operation Summary (Witold - 07 March)
• Trigger and Trigger Lines (Hojeong - 07 March)
• DCH and other sub-detectors) (Martin - 07 March)
• IFR (Valentina - 07 March)
• IFR (Bob - 15 March)
• DIRC (Nicolas - 16 March)
• SVT Diamond sensors 2007 Scan and 2005 Scan (23 March)
• DIRC scalers and neutron counters for the 2005 scan (Nicolas - 23 March)
• DCH with true angles (Martin - 23 March)

HER Single Beam X-angle Scan:

• BaBar runs: 70883, 70884.
• Bunch pattern: 0-3000. BPM measdef at bucket 200.
• Y-angle = +1.1 mrad, adjusted manually at each X-angle step.
• Beam current: 300 mA.
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]HERXPS_1_7MAR.DAT
• HER X-Angle Scan .

HER Single Beam Y-angle Scan:

• BaBar runs: 70884, 70885.
• Bunch pattern: 0-3000. BPM measdef at bucket 200.
• X-angle = -16.7 mrad.
• Beam current: 300 mA.
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]HERYPS_1_7MAR.DAT
• HER Y-Angle Scan .

HER Single Beam: High Current

• BaBar run: 70886.
• Bunch pattern: 0-3000. BPM measdef at bucket 200.
• X-angle = -17.0 mrad (optimum from scan).
• Y-angle = 1.1 mrad (optimum from scan).
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]HERIS_1_7MAR.DAT
• High Current .

LER Single Beam X-angle Scan:

• BaBar run: 70887
• Initial Bunch pattern: 400-3400. BPM measdef at bucket 3200. But switched back to regular by-2 (See time history below)
• X-angle init = 9.1 mrad.
• Y-angle = -1.1 mrad, adjusted manually at each X-angle step.
• Beam current: 300 mA.
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]LERXPS_1_7MAR.DAT
• LER X-Angle Scan .

LER Single Beam Y-angle Scan:

• BaBar runs: 70889.
• Uli changed gain of LFB.
• Initial Bunch pattern: 400-3400. BPM measdef at bucket 3200. But switched back to regular by-2 (See time history below)
• X-angle optimum = 9.1 mrad.
• Y-angle init = -1.1 mrad, No X-angle compensation.
• Beam current: 360 mA.
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]LERYPS_1_7MAR.DAT
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]LERYPS_2_7MAR.DAT
• LER X-Angle Scan .

LER Single Beam: High Current

• BaBar run: 70890, 70891.
• Bunch pattern: regular by-2. BPM measdef at bucket 3200.
• X-angle = 9.1 mrad (optimum from scan).
• Y-angle = -1.1 mrad (optimum from scan).
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]LERIS_1_7MAR.DAT
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]LERIS_2_7MAR.DAT
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]LERIS_3_7MAR.DAT
• High Current .

Collisions: Luminosity Scan

• BaBar run: .
• Bunch pattern: HER 0-3000, LER 400-3400.
• HER angles: X-angle = -16.36 mrad, Y-angle = 1.06 mrad.
• I_LER=375 mA, I_HER=325 mA.
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]LERLUMI_7MAR.DAT
• CRR plot file: PHYSICS5_DATA:[PEP2.CHAR.5MAR07]HERLUMI_7MAR.DAT
• Unfortunately, the MultiKnob feedback was not working: No Lumi scan.

Notes:

• CRR plot files have been filtered and converted to ROOT ntuples here.

This page is maintained by Matt Weaver and Philippe Grenier