Daniel Rees

TL;DR: In this paper, the reaction kinetics of the CO oxidation reaction on Pt/Al 2 O 3 and Pd/Al O 3 were measured in a packed bed reactor heated by microwave energy.

TL;DR: In this article, the initial commissioning of a 6.7-MeV 100-mA RFQ is reported, which is part of the H + injector for the Accelerator Production of Tritium (APT) project.

TL;DR: The high-power RF testing of the 16 EEV coaxial windows of Chelmsford, England are described and the successes and failures in the conditioning, manufacturing and testing techniques of the windows are presented.

Abstract: Spallation Neutron Source (SNS) accelerator includes a nominally 1000 MeV, 2 mA average current linac consisting of a radio frequency quadrupole (RFQ), drift tube linac (DTL), coupled cavity linac (CCL), a medium and high beta superconducting (SC) linac, and two buncher cavities for beam transport to the ring. Los Alamos is responsible for the RF systems for all sections of the linac. The SNS linac is a pulsed proton linac and the RF system must support a 1 msec beam pulse at up to a 60 Hz repetition rate. The RFQ and DTL utilize seven, 2.5 MW klystrons and operate at 402.5 MHz. The CCL, SC, and buncher cavities operate at 805 MHz. Six, 5 MW klystrons are utilized for the CCL and buncher cavities while eighty-one 550 kW klystrons are used for the SC cavities. All of the RF hardware for the SNS linac is currently in production. This paper will present details of the RF system-level design as well as specific details of the SNS RF equipment. The design parameters will be discussed. One of the design challenges has been achieving a reasonable cost with the very large number of high-power klystrons. The approaches we used to reduce cost and the resulting design compromises will be discussed.