Measurement of magnetic permeability of steel laminations of Booster gradient magnets

A Cost-Effective Rapid-Cycling Synchrotron

The present Fermilab proton Booster is an early example of a rapidly-cycling synchrotron (RCS). Built in the 1960s, it features a design in which the combined-function dipole magnets serve as vacuum chambers. Such a design is quite cost-effective, and it does not have the limitations associated with the eddy currents in a metallic vacuum chamber. However, an important drawback of that design is a high impedance, as seen by a beam, because of the magnet laminations. More recent RCS designs (e.g. J-PARC) employ large and complex ceramic vacuum chambers in order to mitigate the eddy current effec…

费米实验室Booster中微子束流线的靶多丝探测器

Target Multiwire for the Fermilab Booster Neutrino Beamline

针对费米实验室Booster中微子束流线原有多丝剖面监测器辐射损伤的问题，研究人员设计了采用镀金钨丝、氧化铝陶瓷平面与耐辐射材料的新型BNB靶多丝探测器，可实现精确的束流剖面测量，本文详述其设计功能并展示相关数据。

Test of a 1.8 Tesla, 400 Hz Dipole for a Muon Synchrotron

A 1.8 T dipole magnet using thin grain oriented silicon steel laminations has been constructed as a prototype for a muon synchrotron ramping at 400 Hz. Following the practice in large 3 phase transformers and our own Opera-2d simulations, joints are mitred to take advantage of the magnetic properties of the steel which are much better in the direction in which the steel was rolled. Measurements with a Hysteresigraph 5500 and Epstein frame show a high magnetic permeability which minimizes stored energy in the yoke allowing the magnet to ramp quickly with modest voltage. Coercivity is low which …

PIP-II加速器复杂度升级中的ORBUMP脉冲双极磁铁机械设计

Mechanical Design of the PIP-II ORBUMP Pulsed Dipole Magnet

PIP-II项目升级中，设计了用于提高磁场和脉冲频率的ORBUMP脉冲双极磁铁，采用低碳钢叠片和PEEK绝缘材料，通过有限元分析优化结构，确保磁场均匀性和磁性能。