Title :
Testing coaxial switches of BPM using a high-resolution RF detector
Author_Institution :
Nat. Lab. for High Energy Phys., Ibaraki, Japan
Abstract :
A high-resolution RF detector has been developed in order to test a coaxial switch used in a beam-position monitor (BPM). The detector with a digital multi-meter (DMM) has an RMS resolution of the order of 10-6 in short time and a wide linear range of 50 dB. Though detected voltage depends on temperature, it can be compensated by measuring the detector temperature. The insertion loss and its stability of several types of switches were measured at 1.0 GHz using the detector. The normalized positions are kept within ±3x10-5, which corresponds to about ±1.0 μm in a chamber of the KEKB. The detector is useful to evaluate the insertion loss of switches
Keywords :
accelerator RF systems; digital multimeters; electron accelerators; particle beam diagnostics; position measurement; semiconductor switches; storage rings; 1 GHz; KEKB; RMS resolution; beam-position monitor; coaxial switches testing; digital multimeter; high-resolution RF detector; insertion loss; normalized positions; switches stability; Coaxial components; Detectors; Insertion loss; Monitoring; Radio frequency; Switches; Temperature dependence; Temperature measurement; Testing; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505619
