1 NFMCC Friday Meeting January 4, 2008 Optical Diagnostic Results of MERIT Experiment at CERN HeeJin Park.

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Presentation transcript:

1 NFMCC Friday Meeting January 4, 2008 Optical Diagnostic Results of MERIT Experiment at CERN HeeJin Park

2 Optics Configuration with respect to Beam Total 360 beam shots performed. Images for 260 beam shots are collected. MERIT beam shot summary website, Z=0

3 Observation : Interaction of Hg Jet with 14 GeV Beam 5T, 16TP 10T, 12TP 0T, 8TP 5T, 16TP 10T, 20TP 0T, 4TP

4 Observation : Velocity of Splash, 24GeV 3.8TP, 10T 6TP, 5T t=0 t=0.175 ms t=0.375 ms V = 24 m/s t=0.150 ms t=0 t=0.175 ms t=0.375 ms t=0.050 ms V = 47 m/s

5 10TP, 10T 20TP, 10T t=0 t=0.175 ms t=0.375 ms V = 54 m/s t=0.075 ms t=0 t=0.175 ms t=0.375 ms t=0.050 ms V = 65 m/s Observation : Velocity of Splash, 24GeV

6 Horizontal Scan with Target In, 14GeV Program

7 Intensity Scan, 14GeV Program

8 Threshold Scan, 14GeV Program

9 Intensity Scan, 24GeV Program

10 Intensity Scan, 14GeV vs 24GeV Program

11 Conclusions 1.It is observed that the splash begins at the bottom of jet and ends at the top of jet. which is consistent with the beam trajectory. Under relatively strong intensity of beam, jet breaks up but can be confined by magnetic field. The breakup line might be consistent with the beam trajectory and the product of cavity caused by the energy deposition of beam. 2. The splash velocity increases as the beam intensity goes up. However, magnetic field will reduce the effect. 3. As the beam intensity goes up, the interaction length increases and it is somewhat suppressed by magnetic field GeV beam has longer interaction length than 14GeV beam. The intensity of threshold in 24GeV beam is lower than 14GeV beam.