Fifth CW and High Average Power RF Workshop

Session

Friday morning

Mar 28, 2008, 9:00 AM

40-S2-C01 (CERN)

15. High power, wideband, solid-state amplifiers for LEIR and J-PARC RF systems.

Mr Mauro Paoluzzi (CERN)

3/28/08, 9:00 AM

Starting from a basic 120 W building block covering the frequency range 0.1-80 MHz, amplifiers with power levels ranging from 1 kW to 9 kW have been designed at CERN for LEIR and J-PARK Rapid Cycling Synchrotron and Main Ring RF systems. About 1000 basic 120 W modules have been built and are now in operation. The design options, splitting and combining techniques, powering, cooling and...

12. RF Tests of Chemical Additives for Water Cooled RF Loads

Dr Karen Young (LANL)

3/28/08, 9:40 AM

This paper discusses the RF performance of high power RF water loads at 201.25 MHz for the LANSCE RF system using chemical additives to ionize the cooling water. RF loads at 201.25 MHz that dissipate the RF power directly into the water usually use some kind of additive to increase the number of free ions in the water and thus, increasing the RF absorption. Presently cooling water from a...

28. New IPA Design for 500 MeV TRIUMF Cyclotron

Mr amiya mitra (TRIUMF)

3/28/08, 10:20 AM

A new intermediate power amplifier (IPA) is currently being designed to improve the reliability of the main rf system of the 500 MeV Cyclotron at TRIUMF. A four-way matching pi-network circuit divides the power output from the present 100 KW IPA which drives four power amplifiers to produce 1 MW of rf power. Poor isolation between the four outputs makes it difficult to tune the power...

25. CEA-Saclay high voltage modulator for pulsed klystrons

Mr Abdallah HAMDI (CEA/Saclay)

3/28/08, 11:15 AM

The need for new RF power sources operating at different frequencies implies to develop HV sources to match their specifications. Two pulsed klystrons are employed at Saclay Supratech platform for R&D on superconducting accelerating cavities at 704MHz and 1300MHz and for 704MHz power couplers processing. A hard tube modulator that was at first developed for the 1300MHz klystron operation has...

34. Update of Operating Experience and Reliability of Klystrons at Jefferson Lab

Richard Walker (Jefferson Lab)

3/28/08, 11:55 AM

This talk is an update of the operating experiences and reliabilty of over 350 klystrons at Jefferson Lab over the past 15 years. We experienced a serious failure mode in the klystron, but were able to indentify the causes and find good solutions to these problems. Analysis and pictures will be shown to demonstrate the problems. Reliability data will be given on the results of the changes...

39. Short session on "Development of power amplifier modules for the ACOL stochastic cooling systems"

Dr Fritz Caspers

3/28/08, 12:35 PM