We describe a technique we have developed to significantly increase the proton fraction extracted from high pressure (mTorr) electron cyclotron resonance (ECR) sources of the type developed by Chalk River Laboratories (CRL)[1]. Specifically, this proton enhancement is achieved by the addition of environmentally benign additives (H_2O being the most effective) to the plasma, in molecular concentrations of the order of 1%. Typically, operating under non-resonant source conditions, this technique will enhance the proton fraction from about 75% to greater than 95% for a power input of 700W at 2.45 GHz. Similar results are achieved for deuteron beams. We believe this technique is capable of similar results in arc-discharge (bucket) sources, Penning sources and any other gas discharge sources, under suitable conditions.
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机译：我们描述了一种已开发的技术，该技术可显着提高从Chalk River Laboratories（CRL）开发的类型的高压（mTorr）电子回旋共振（ECR）源中提取的质子分数。具体而言，通过向血浆中添加环境友好型添加剂（H_2O最有效）（分子浓度约为1％）来实现这种质子增强。通常，在非谐振源条件下运行时，对于2.45 GHz时700W的功率输入，此技术会将质子分数从约75％增大到大于95％。氘核束也获得了类似的结果。我们相信，在适当的条件下，该技术能够在电弧放电（桶）源，潘宁源和任何其他气体放电源中产生相似的结果。
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