LEDA射束操作里程碑和观察到的射束传输特性
LEDA Beam Operations Milestone and Observed Beam Transmission Characteristics
摘要：
最近，氚加速器生产（APT）项目的低能示范加速器（LEDA）部分达到了100 mA，8小时连续波束流运行的里程碑。LEDA由一个75 keV质子注入器，6.7 MeV，350 MHz CW射频四极杆与相关的高功率和低电平射频系统，短高能束流传输（HBT）和高功率（670 kW CW）束流收集器组成。在试运行阶段，人们发现，为了以低损耗加速整个100 mA射束，磁场水平必须比设计高出约5-10%。低占空比，100毫安的光束的测量表明，光束传输是出乎意料的低？90和105%的设计之间的磁场水平。本文将介绍LEDA运营的一些方面，这些方面对于实现上述里程碑至关重要。测量和模拟结果，减少近设计工作条件下的光束传输。
英文摘要：
Recently, the Low-Energy Demonstration Accelerator (LEDA) portion of the Accelerator Production of Tritium (APT) project reached its 100-mA, 8-hr CW beam operation milestone. LEDA consists of a 75-keV proton injector, 6.7-MeV, 350-MHz CW radio-frequency quadrupole (RFQ) with associated high-power and low-level rf systems, a short high-energy beam transport (HEBT) and high-power (670-kW CW) beam dump. During the commissioning phase it was discovered that the RFQ field level must to be approximately 5-10% higher than design in order to accelerate the full 100-mA beam with low losses. Measurements of a low-duty-factor, 100-mA beam show the beam transmission is unexpectedly low for RFQ field levels between ~90 and 105% of design. This paper will describe some aspects of LEDA operations critical to achieving the above milestone. Measurement and simulation results for reduced RFQ beam transmission near design operating conditions are also presented.
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