Diagnostics Used in Commissioning the IUCF Cooler Injector Synchrotron.pdfVIP

Diagnostics Used in Commissioning the IUCF Cooler Injector Synchrotron Mark S. Ball, Dennis L. Friesel, Brett J. Hamilton Indiana University Cyclotron Facility 2401 Milo Sampson Ln., Bloomington, IN 47408 Abstract. Several new diagnostics systems were designed to aid in the commissioning of the IUCF Cooler Injection Synchrotron (CIS). Among them are a time of flight measurement system (ToF), a multi-wire profile monitor system (Harp) and a beam position monitor system (BPM). Pulsed beam from the 7 MeV linear accelerator is monitored using the ToF system. Several removable Harps are mounted in the injection beamline and ring which are instrumental for tuning ring injection and accumulation. BPMs are placed at the entrance and exit of the four ring dipole magnets to facilitate beam centering during injection and ramping. Fast and slow BPM displays are available to the operator for these functions. These diagnostics and their uses for CIS ring commissioning will be discussed. ENERGY MEASUREMENT A time of flight system (ToF) is being used in the 7 MeV injection beamline to detect changes in the beam energy from the RFQ/DTL. The system is similar to the one used at TRIUMF (1), where a change in energy is measured as a change in phase between two pickups of a fixed, known distance apart. The 200 µs pulsed beam is accelerated through the RFQ/DTL using a 425 MHz, 300 kW rf amp. The non-interceptive, resonant, beam pickups are immediately down- stream of the accelerator, 2.5 meters apart. A beam signal is detected, buffered and sent to the ToF electronics. An Analog Device AD607 (2) is used as an rf to if, 10.7 MHz, converter. The AD607 is normally used in wireless communica