PMID- 25725868
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20150521
LR  - 20150302
IS  - 1089-7623 (Electronic)
IS  - 0034-6748 (Linking)
VI  - 86
IP  - 2
DP  - 2015 Feb
TI  - Preliminary investigation of an improved metal-dielectric cathode for 
      magnetically insulated transmission line oscillator.
PG  - 024705
LID - 10.1063/1.4907934 [doi]
AB  - In order to explore the cathode with good repetition quality for the magnetically 
      insulated transmission line oscillators, an improved metal-dielectric cathode is 
      proposed and investigated experimentally. The cathode is designed to be step-like 
      shape, and thin copper plated boards are periodically and compactly arrayed on 
      the surface of the cathode base, which ensures the uniformity of the electrons 
      emitted from the cusps of the copper plated boards. According to the numerical 
      simulation results, the step-like shape is beneficial to convert the kinetic 
      energy of the magnetic insulating current partially and enhance the beam-wave 
      interaction efficiency. Finally, a preliminary experiment of an L-band 
      magnetically insulated transmission line oscillator (MILO) with the improved 
      metal-dielectric cathode is carried out. A high power microwave (HPM) with an 
      average power of 1.95 GW is generated from the MILO, with an efficiency of 13.5%. 
      Under the same experiment condition, the output power and main frequency with the 
      presented cathode are almost the same to those with the velvet cathode. Apart 
      from that, metal-dielectric cathode has the merits of small outgassing and long 
      lifetime, and all of these make the improved metal-dielectric cathode 
      significantly promising for the MILO repetition operation.
FAU - Zhang, Xiaoping
AU  - Zhang X
AD  - College of Optoelectronic Science and Engineering, National University of Defense 
      Technology, Changsha 410073, People's Republic of China.
FAU - Dang, Fangchao
AU  - Dang F
AD  - College of Optoelectronic Science and Engineering, National University of Defense 
      Technology, Changsha 410073, People's Republic of China.
FAU - Zhang, Jun
AU  - Zhang J
AD  - College of Optoelectronic Science and Engineering, National University of Defense 
      Technology, Changsha 410073, People's Republic of China.
FAU - Fan, Yuwei
AU  - Fan Y
AD  - College of Optoelectronic Science and Engineering, National University of Defense 
      Technology, Changsha 410073, People's Republic of China.
FAU - Li, Zhiqiang
AU  - Li Z
AD  - College of Optoelectronic Science and Engineering, National University of Defense 
      Technology, Changsha 410073, People's Republic of China.
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Rev Sci Instrum
JT  - The Review of scientific instruments
JID - 0405571
EDAT- 2015/03/03 06:00
MHDA- 2015/03/03 06:01
CRDT- 2015/03/02 06:00
PHST- 2015/03/02 06:00 [entrez]
PHST- 2015/03/03 06:00 [pubmed]
PHST- 2015/03/03 06:01 [medline]
AID - 10.1063/1.4907934 [doi]
PST - ppublish
SO  - Rev Sci Instrum. 2015 Feb;86(2):024705. doi: 10.1063/1.4907934.