Cavity BPM System Tests for the ILC Spectrometer
M. Slater, C. Adolphsen, R. Arnold, S. Boogert, G. Boorman, F., Gournaris, M. Hildreth, C. Hlaing, F. Jackson, O. Khainovski, Yu. G., Kolomensky, A. Lyapin, B. Maiheu, D. McCormick, D. J. Miller, T. J. Orimoto,, Z. Szalata, M. Thomson, D. Ward, M. Wing, M. Woods
TL;DR
This paper reports on cavity BPM system tests for the ILC spectrometer, demonstrating high resolution and stability crucial for precise beam energy measurements at the interaction point.
Contribution
It presents the deployment and testing of a cavity BPM system achieving sub-micron resolution and stability, advancing beam energy measurement techniques for the ILC.
Findings
Sub-micron resolution achieved in cavity BPMs
Micron-level stability over 20 hours for a 1m triplet
Micron-level stability over 1 hour across 30m baseline
Abstract
The main physics programme of the International Linear Collider (ILC) requires a measurement of the beam energy at the interaction point with an accuracy of or better. To achieve this goal a magnetic spectrometer using high resolution beam position monitors (BPMs) has been proposed. This paper reports on the cavity BPM system that was deployed to test this proposal. We demonstrate sub-micron resolution and micron level stability over 20 hours for a long BPM triplet. We find micron-level stability over 1 hour for 3 BPM stations distributed over a long baseline. The understanding of the behaviour and response of the BPMs gained from this work has allowed full spectrometer tests to be carried out.
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Taxonomy
TopicsParticle Accelerators and Free-Electron Lasers · Photonic and Optical Devices · Advancements in PLL and VCO Technologies