Beam Emittance,Transmission, and Intensity Distribution Measurements of the Northrop Grumman Corporation 1.76 MeV Pulsed Beamline and Contraband Detection System Target Test Facility

摘要

The Northrop Grumman Advanced Technology and Development Center beamline consists of an RF driven ion source and double solenoid LEBT, a 1.013 MeV electroformed RFQ, a matching section (MS) bunching cavity, a 1.76 MeV DTL, and a HEBT designed to deliver a 10 mA H+ beam to a prototype contraband detection system (CDS) target .We have characterized the beam phase space in the LEBT, at the RFQ output, MS output, and DTL/HEBT output as a function of ion source, LEBT, RF cavity and HEBT parameters with a pair of electrostatic sweep emittance scanners. The beamline transmission was measured with Faraday cups and toroids. The beam intensity distribution incident on a CDS test target was obtained from radiometric surface temperature measurements of the target with a scanning HgCdTe infrared detector. In this paper we will discuss the performance and operational characteristics of this beamline and present data on beam characteristics for nominal and off nominal RF cavity operation.