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Stanford DG535 (Repetition Rate) This unit sets the macropulse repetition rate by inhibiting the 100 Hz timing signal from the chopper wheel. Quantum Composer 8-Channel timing unit This unit is triggered by the Repetition Rate DG535, and takes a clock input from the 81.25 MHz RF reference.
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Stanford DG535(Repetition Rate) This unit sets the macropulse repetition rate by inhibiting the 100 Hz timing signal from the chopper wheel Quantum Composer 8-Channel timing unit This unit is triggered by the Repetition Rate DG535, and takes a clock input from the 81.25 MHz RF reference. On triggering, it waits for the next RF clock cycle, then cascades trigger signals to the Mechanical Shutter (selecting a specific macropulse), and to the Macropulse LengthDG535 to set the macropulse length. Additional trigger signals are provided to the rack room and the TW laser. AΠB Trig Sync 81.25 MHz A B C D E F G H TW Laser Rack Room 1 Streak Camera 7 Mechanical Shutter The mechanical shutter selects specific macropulses from the 100 Hz macropulse train to define the 1, 2, 5, 10 or 20 Hz repetition rate Stanford DG535(Macropulse Length) This unit provides trigger to the Pockels cell driver to define the macropulse length Chopper wheel Rotates at 100 Hz and contains a timing photodiode to signal position on each turn. A slot cut in the disc passes a 130 ms laser pulse train every turn. 4 3 A B C D T Pockels Cell Driver
