A 100 GIGAHERTZ ACQUISITION OF BUNCH PROFILE, POSITION, AND ARRIVAL TIME FOR PARTICLE ACCELERATOR DIAGNOSTICS AND CONTROL

THIS PROJECT WILL DEVELOP AN ACQUISITION SYSTEM THAT CAN CAPTURE EERY SUPERCONDUCTING SUPER COLLIDER (SSC) BEAM BUNCH AND MEASURE IN REAL-TIME: BEAM CURRENT PROFILE CAPTURED AT 100 GIGASAMPLES (GS)/S WITH 6-BITS OF RESOLUTION, BUNCH TIME OF ARRIVAL TO 10 PS RELATIVE TO A SYNCHRONIZED MASTER CLOCK, AND BEAM POSITION TO 25 MICRONS EVERY 10 PS. THE SYSTEM USES PICKUP COILS ALONG THE BEAM AXIS. ONE SET OF PICKUP COILS IS CONNECTED TO A SUPERCONDUCTING 100 GHZ DIGITIZER WHICH WILL ACQUIRE 24 SAMPLES OF 4-BIT DELTAS REPRESENTING THE CHANGE OF CURRENT INDUCED IN THE PICKUP COIL BY A BEAM BUNCH. TWO MORE IDENTICAL DIGITIZERS ARE CONNECTED TO DIFFERENTIAL X AND Y AXIS PICKUP COILS. THESE WILL ACQUIRE 24 SAMPLES EACH REPRESENTING THE CHANGE IN POSITION OF THE BEAM CURRENT BUNCH WITH A 25 MICRON RESOLUTION EVERY 10 PS, AND THUS WILL MEASURE DEVIATION WITHIN A BUNCH. A SEPARATE CIRCUIT WILL