Reshape of the Bunch-by-bunch BPM Signal to a Turn-by-turn Matrix during the Fast RF Frequency-sweeping Time in Booster

Analytical Solution for BPM Reading the Multi-bunch Average in Booster

The BPM system in Booster only can provide the beam position from the average of about 15 bunches due to the electronic limitation. Numerically calculating the difference made by this average can nearly give all the information, which is needed for extrapolating the BPM data. It is still useful to derive the analytical expression for the BPM reading, which can be helpful in getting the insight for the BPM system optimization.

通过BPM测量的四极模得到的费米实验室助推器束流发射度

Fermilab Booster Beam Emittances from Quadrupole Modes Measured by BPMs

针对传统四极模BPM测束流发射度信噪比低、调试量大的问题，提出多BPM结合优化数学分析的改进方法，测得的费米实验室助推器束流发射度比IPM结果更真实。

通过BPM四极子矩测量射流发散度的评估

Benchmarking the Use of BPM Quadrupole Moments to Measure Emittance

通过BPM四极子矩测量发散度，与IPM和多丝数据结果一致，可补充现有非拦截发散度监控器。

Tune Evaluation From Phased BPM Turn-By-Turn Data

In fast ramping synchrotrons like the Fermilab Booster the conventional methods of betatron tune evaluation from the turn-by-turn data may not work due to rapid changes of the tunes (sometimes in a course of a few dozens of turns) and a high level of noise. We propose a technique based on phasing of signals from a large number of BPMs which significantly increases the signal to noise ratio. Implementation of the method in the Fermilab Booster control system is described and some measurement results are presented.

利用 BPM 进行飞行时间能量测量

Time-of-flight Energy Measurements with BPMs

本文介绍在 Fermilab PIP-II H- 直线加速器中，通过测量相邻 BPM 的束流相位推导非相对论性离子束能量的方法，并利用“能量偏差”参数追踪能量偏离。