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Eurisol DS, Task 11 meeting, Helsinki September‘07 Task 11.2: Fragmentation of post accelerated ISOL beams David Pérez Loureiro Universidad de Santiago de Compostela, Spain
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Eurisol DS, Task 11 meeting, Helsinki September‘07 Production of extremely neutron-rich nucleus Two step scheme; fission + cold fragmentation n,p + 238 U 132 Sn + Be X Milestones and expected results: - preparation of an experiment (month 12) - data analysis of the experiment (month 28) delayed (Nov 06) - optimal post-acceleration energy estimation (33 month)
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Eurisol DS, Task 11 meeting, Helsinki September‘07 Proposed experiment S2-S4: 124-132 Sn + Be X A/A ~ 2.4 10 -3 Z/Z ~ 7 10 -3 B / ~ 3 10 -4 ToF ~ 150 ps L ~ 36 m S0-S2: 238 U(950 A MeV)+Pb 124-132 Sn Z/Z ~ 5 10 -3 B / ~ 3 10 -4 ToF ~ 150 ps L ~ 18 m A/A ~ 4.5 10 -3 FRS-GSI
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Eurisol DS, Task 11 meeting, Helsinki September‘07 Proposed experiment S0-S2: 238 U(950 A MeV)+Pb 124-132 Sn Z/Z ~ 5 10 -3 B / ~ 3 10 -4 ToF ~ 150 ps L ~ 18 m A/A ~ 4.5 10 -3 Experiment proposal was submitted and approved by the GSI PAC (18 shifts 136 Xe-parasitic and 18 shifts 238U ) Beam time expected scheduled July 2006 delayed until November FRS-GSI
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Eurisol DS, Task 11 meeting, Helsinki September‘07 Completed work during the first 18 months Detection setup: plastic scintillator at S1 - two fast photo-multipliers Hamamatsu H2431-50mod delivered to GSI last December - these photo-multipliers were tested in a beam time last April The experiment proposal was submitted and approved by the GSI PAC (18 shifts 136Xe-parasitic and 18 shifts 238U ) Acquisition system: new readout using the buffer memory of the CAEN converters - the system has been implemented and tested with 2 TDC + 1 ADC - final implementation in the FRS DAQ after summer Detection setup: tracking detectors at S2 - TPCs will be used. New TPCs tested in a beam time last April New on-line analysis based on Go4 implemented and tested
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Eurisol DS, Task 11 meeting, Helsinki September‘07 Planned work for the next months Implementation and test of the new acquisition at the FRS Fix last details of the experimental setup - calibration requirements for TPCs - photo-multipliers at S2 - removable target at S2 Detailed planning of the experiment - calculation of the magnetic tunings of the FRS - calibration planning with the 136 Xe beam - definition of working teams Final schedule of the beam time: constraints
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Eurisol DS, Task 11 meeting, Helsinki September‘07 Preliminary beam-time schedule at GSI
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Eurisol DS, Task 11 meeting, Helsinki September‘07 Modifications of initial plans The beam time will be scheduled 9 months later than expected - all milestones of these subtask will be delayed by 9 months
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