SPS SyncrotronTelescope Software specifications Aurélie GoldblattBE-BI-PM 20.03.2014
SPS properties • Period: 23 us • Timing supercycle: 0.8 Hz • 25ns bunch spacing => 40MHz • Number of 25ns buckets: 924 • Max number of proton bunches: 4x72 =288 (intensity limitation, only for LHC injection?). 225 ns spacing between batches • Flat top = 1.2s (to be confirmed) • Fix target beam has more bunches with less intensity per bunch (and goes only to 400GeV) ?
Camera Analog intensified and gated camera Proxitronic (LHC BSRT camera) Acquisition rate = 50Hz but through MTV= 3-4 Hz Expected acquisition: 4-5 bunches per fillin bunch mode (if only measurable at flat top) • Camera Acquisition (MTV) • Camera ON/OFF (TTL VMOD)
Gate Control: (DAB, BOBR, TTL VMOD) Two modes: - Bunch Scan: 25ns gate synchronous with timing machine - DC : gate opened Bunch Scan mode: gate synchronized with selected bucket (12.5 ns delay steps, DAB card synchronised with the BST (BOBR) • Bunch selection from a list of filled buckets (FBCT) • Number of acquisitions per bunch • Scan ON,OFF, standby, freeze: • Scan ON: acquire the number of frames selected then go to the next bunch selected. Average on the fit. • Scan OFF: acquisition on selected bunch? (Sliding average on the fit or no average?) • Scan Standby • Scan Freeze
Gain and Position Gain Control:(DAC VMOD , MIDI) • Manual: set the gain and filters manually • Automatic: No feedback. Gain, filters = f(FBCT) or table. Need to calibrate with beam (flat top and ramp?)Need to check intensifier time response. Position Control: (MIDI) • Manual: set the steeringmotors • Automatic: Feedback on the position. Need to copewithbeampresence but not seen by camera (lowenergy).
Motors Control (MIDI) BSR • Steering mirror H • Steering mirror V • Filter wheel (no PC => no pneumatic) • Camera translation stage If LDM: • 2 filter wheels • TS X • TS Y • In/out beam splitter
Display Image from camera: • Area selection (for display and fit) • Cross cut selection • BW/WB/Color • Save/clear/subtract ref image • Accumulate Traces from area selection (default: whole image) • H&V profiles (amplitude vs position) • Measurement • Fit • H&V position vs time • H&V amplitude vs time • H&V sigma vs time Traces from cross cut selection- H&V profile from cross cut
Display On all traces: • Zoom • Pan auto • Marker • Cursors • Grid • Save Readout: • Sigma * • Amplitude • Position *Corrected H&V sigma: where M from calibration and c from wire scanners (?) Remark: no emittance extrapolation, only sigma data for beginning.