N. Bykov, V. Gubanov, A. Gunin, S. Korovin, O. Kutenkov, V. F. Landl, S. Polevin, V. Rostov, G. Mesyats, F. Zagulov
{"title":"Development of long-lifetime cold cathodes","authors":"N. Bykov, V. Gubanov, A. Gunin, S. Korovin, O. Kutenkov, V. F. Landl, S. Polevin, V. Rostov, G. Mesyats, F. Zagulov","doi":"10.1109/PPC.1995.596457","DOIUrl":null,"url":null,"abstract":"The paper presents the results of an experimental study of the cold cathodes used in the Sinus-type repetitive high-current accelerators. The accelerating voltage for this accelerator is on a level of 100-1000 keV, the electron beam current is 1-10 kA, the pulse duration is 10-40 ns, and the pulse repetition rate is up to 200 pps. The emissive properties of the cathodes were investigated for both planar and coaxial magnetically insulated vacuum diodes. To produce high-current electron beams in coaxial diodes, a strong magnetic field of strength up to 30 kOe created by a superconducting solenoid was used. Investigated in the experiment were explosive-emission cold cathodes of varied geometry made of various materials such as copper, steel, stainless steel, bronze, graphite, and carbon-graphite cloth as well as metal-dielectric cathodes depending for their operation on an incomplete electrical discharge over the dielectric surface. The longest lifetime has been attained for a metal-dielectric cathode in a planar vacuum diode; it is over 10/sup 8/ shots. The cathode provided the current density at the anode 20-25 A/cm/sup 2/ for the accelerating voltage 600 kV, pulse duration 20 ns, and pulse repetition rate up to 200 pps.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":"47 1","pages":"71-74 vol.1"},"PeriodicalIF":0.0000,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"16","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PPC.1995.596457","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 16
Abstract
The paper presents the results of an experimental study of the cold cathodes used in the Sinus-type repetitive high-current accelerators. The accelerating voltage for this accelerator is on a level of 100-1000 keV, the electron beam current is 1-10 kA, the pulse duration is 10-40 ns, and the pulse repetition rate is up to 200 pps. The emissive properties of the cathodes were investigated for both planar and coaxial magnetically insulated vacuum diodes. To produce high-current electron beams in coaxial diodes, a strong magnetic field of strength up to 30 kOe created by a superconducting solenoid was used. Investigated in the experiment were explosive-emission cold cathodes of varied geometry made of various materials such as copper, steel, stainless steel, bronze, graphite, and carbon-graphite cloth as well as metal-dielectric cathodes depending for their operation on an incomplete electrical discharge over the dielectric surface. The longest lifetime has been attained for a metal-dielectric cathode in a planar vacuum diode; it is over 10/sup 8/ shots. The cathode provided the current density at the anode 20-25 A/cm/sup 2/ for the accelerating voltage 600 kV, pulse duration 20 ns, and pulse repetition rate up to 200 pps.