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go to Ti sample
Code Block language py theme RDark linenumbers true op.ti()
- remove the Be CRL
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open slit4 to 400 mic
Code Block language py theme RDark linenumbers true op.slit4.move(0.4)
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set full X-ray transmission
Code Block language py theme RDark linenumbers true op.SiT(1)
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open the pulse picker
Code Block language py theme RDark linenumbers true op.pp.open()
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Open the TCC scope
Code Block language py theme RDark linenumbers true op.scope_timing_remote()
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Set the EVR of the scope to 10Hz
Code Block language py theme RDark linenumbers true op.lpl_check_timing("10Hz")
- Set channel 2 to 2 or 5 mV/div
- Confirm that the X-ray pulse is seen around 60 ns.
- Average over 100 sweep and save the trace on M2 (from C2)
- Set the sweep averaging back to 1
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Close the pulse picker
Code Block language py theme RDark linenumbers true op.pp.close()
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Insert the filter in front of Questar 1
Code Block language py theme RDark linenumbers true op.fw(num=1, position=3)
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Set the laser pulse shape to the timing shape
Code Block language py theme RDark linenumbers true op.LPL.psmenu() LXX op.LPL.psefc10Hz()
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Send the 10Hz LPL (enable the trigger of the ns slicer) on target at full energy
Code Block language py theme RDark linenumbers true op.HWPon('all', set_T=1.0)
- Set the channel 2 to 10 mV/div
- Confirm you see a trace on C2
- Average over 100 sweep and save the trace on M3 (from C2)
- Set the sweep averaging back to 1
- Take a screenshot and post it to the elog
- Set the channel 2 to 1V/div
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Set the scope to single shot trigger
Code Block language py theme RDark linenumbers true op.lpl_check_timing("single")
- Further fine timing can be done by using a LiF coated window
- Move to the appropriate target
- Confirm Be CRL are inserted in the beamline
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Set the timing of the drive to 0
Code Block language py theme RDark linenumbers true op.nstiming.mv(0e-9)
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Confirm that the streak window have zero offset in the window size requested
Code Block language py theme RDark linenumbers true op.streak_window(visar=1, window=20, offset=0) op.streak_window(visar=2, window=20, offset=0)
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Take a single refence only shot to observe the change in reflectivity at the arrival time of the X-rays
Code Block language py theme RDark linenumbers true op.ref_only( xray_trans=1, xray_num=1, shutters=False, dark=0, daq_end=True, calibrant="", rate=1, visar=True, save=True, slow_cam=False )
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To double check, confirm timing at another step
Code Block language py theme RDark linenumbers true op.nstiming.mv(10e-9) op.ref_only( xray_trans=1, xray_num=1, shutters=False, dark=0, daq_end=True, calibrant="", rate=1, visar=True, save=True, slow_cam=False )
- Confirm with Fine tune the PI that timing is all settiming is the X-ray trace is not where it is expected using the nstiming.mv function accordingly.
Check Spatial overlap between LPL, VISAR and X-rays on target
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