PMID- 24880374
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20151022
LR  - 20140602
IS  - 1089-7623 (Electronic)
IS  - 0034-6748 (Linking)
VI  - 85
IP  - 5
DP  - 2014 May
TI  - A long-pulse repetitive operation magnetically insulated transmission line 
      oscillator.
PG  - 053512
LID - 10.1063/1.4876599 [doi]
AB  - The improved magnetically insulated transmission line oscillator (MILO) is a 
      gigawatt-class L-band high power microwave tube. It has allowed us to generate 
      3.1 GW pulse of 40 ns duration in the single-pulse operation and 500 MW pulse of 
      25 ns duration in the repetition rate operation. However, because of the severe 
      impedance mismatch, the power conversion efficiency is only about 4% in the 
      repetition rate operation. In order to eliminate the impedance mismatch and 
      obtain repetitive long-pulse high-power microwave (HPM), a series of experiments 
      are carried out and the recent progress is presented in this paper. In the 
      single-pulse operation, when the diode voltage is 466 kV and current is 41.6 kA, 
      the radiated microwave power is above 2.2 GW, the pulse duration is above 102 ns, 
      the microwave frequency is about 1.74 GHz, and the power conversion efficiency is 
      about 11.5%. In the repetition rate operation, under the condition of the diode 
      voltage about 400 kV, beam current about 38 kA, the radiated microwave power is 
      about 1.0 GW, the pulse duration is about 85 ns. Moreover, the radiated microwave 
      power and the pulse duration decline little by little when the shot numbers 
      increase gradually. The experimental results show that the impedance matching is 
      a vital factor for HPM systems and one of the major technical challenges is to 
      improve the cathode for the repetition rate operation MILO.
FAU - Fan, Yu-Wei
AU  - Fan YW
AD  - College of Optoelectric Science and Engineering, National University of Defense 
      Technology, Changsha 410073, China.
FAU - Zhong, Hui-Huang
AU  - Zhong HH
AD  - College of Optoelectric Science and Engineering, National University of Defense 
      Technology, Changsha 410073, China.
FAU - Zhang, Jian-De
AU  - Zhang JD
AD  - College of Optoelectric Science and Engineering, National University of Defense 
      Technology, Changsha 410073, China.
FAU - Shu, Ting
AU  - Shu T
AD  - College of Optoelectric Science and Engineering, National University of Defense 
      Technology, Changsha 410073, China.
FAU - Liu, Jin Liang
AU  - Liu JL
AD  - College of Optoelectric Science and Engineering, National University of Defense 
      Technology, Changsha 410073, China.
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Rev Sci Instrum
JT  - The Review of scientific instruments
JID - 0405571
EDAT- 2014/06/02 06:00
MHDA- 2014/06/02 06:01
CRDT- 2014/06/02 06:00
PHST- 2014/06/02 06:00 [entrez]
PHST- 2014/06/02 06:00 [pubmed]
PHST- 2014/06/02 06:01 [medline]
AID - 10.1063/1.4876599 [doi]
PST - ppublish
SO  - Rev Sci Instrum. 2014 May;85(5):053512. doi: 10.1063/1.4876599.