Cavity beam position monitor system for the Accelerator Test Facility 2

Abstract

The Accelerator Test Facility 2 (ATF2) is a scaled demonstrator system for final focus beam lines of linear high energy colliders. This paper describes the high resolution cavity beam position monitor (BPM) system, which is a part of the ATF2 diagnostics. Two types of cavity BPMs are used, C-band operating at 6.423 GHz, and S-band at 2.888 GHz with an increased beam aperture. The cavities, electronics, and digital processing are described. The resolution of the C-band system with attenuators was determined to be approximately 250 nm and 1 m for the S-band system. Without attenuation the best recorded C-band cavity resolution was 27 nm.

16 pp

References in corpus (3)

• Present status and first results of the final focus beam line at the KEK Accelerator Test Facility
• Cavity BPM System Tests for the ILC Spectrometer
• Results from a Prototype Chicane-Based Energy Spectrometer for a Linear Collider

Cited by in corpus (6)

• Conceptual design of elliptical cavities for intensity and position sensitive beam measurements in storage rings
• Matching small $\beta$ functions using centroid jitter and two beam position monitors
• Laserwire at the Accelerator Test Facility 2 with Sub-Micrometre Resolution
• A high-resolution, low-latency, bunch-by-bunch feedback system for nano-beam stabilization
• A sub-micron resolution, bunch-by-bunch beam trajectory feedback system and its application to reducing wakefield effects in single-pass beamlines
• Principal Component Analysis of Cavity Beam Position Monitor Signals