PMID- 18377036
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20080610
LR  - 20080401
IS  - 0034-6748 (Print)
IS  - 0034-6748 (Linking)
VI  - 79
IP  - 3
DP  - 2008 Mar
TI  - Recent progress of the improved magnetically insulated transmission line 
      oscillator.
PG  - 034703
LID - 10.1063/1.2894212 [doi]
AB  - The improved magnetically insulated transmission line oscillator (MILO) is a 
      gigawatt-class L-band high power microwave tube driven by a 550 kV, 57 kA, 50 ns 
      electron beam. It has allowed us to generate 2.4 GW pulse of 22 ns duration. The 
      recent progress of the improved MILO is presented in this paper. First, a field 
      shaper cathode is introduced into the improved MILO to avoid the cathode flares 
      in the triple point region. The experimental results show that the cathode flares 
      are avoided, so the lifetime of the velvet cathode is longer than that of the 
      taper cathode. Furthermore, the shot-to-shot reproducibility is better than that 
      of the taper cathode. Second, In order to prolong the pulse duration and increase 
      the radiated microwave power, a self-built 600 kV, 10 Omega, 80 ns pulser: 
      SPARK-03 is employed to drive the improved MILO. Simulation and experimental 
      investigation are performed. In simulation, when the improved MILO is driven by a 
      600 kV, 57 kA electron beam, high-power microwave is generated with output power 
      of 4.15 GW, frequency of 1.76 GHz, and relevant power conversion efficiency of 
      12.0%. In experiments, when the diode voltage is 550 kV and current is 54 kA, the 
      measured results are that the radiated microwave power is above 3.1 GW, the pulse 
      duration is above 40 ns, the microwave frequency is about 1.755 GHz, and the 
      power conversion efficiency is about 10.4%.
FAU - Fan, Yu-Wei
AU  - Fan YW
AD  - College of Optoelectric Science and Engineering, National University of Defense 
      Technology, Changsha 410073, People's Republic of China. fyw9108212@126.com
FAU - Zhong, Hui-Huang
AU  - Zhong HH
FAU - Li, Zhi-Qiang
AU  - Li ZQ
FAU - Shu, Ting
AU  - Shu T
FAU - Zhang, Jian-De
AU  - Zhang JD
FAU - Liu, Jin-Liang
AU  - Liu JL
FAU - Yang, Jian-Hua
AU  - Yang JH
FAU - Zhang, Jun
AU  - Zhang J
FAU - Yuan, Cheng-Wei
AU  - Yuan CW
FAU - Luo, Ling
AU  - Luo L
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Rev Sci Instrum
JT  - The Review of scientific instruments
JID - 0405571
EDAT- 2008/04/02 09:00
MHDA- 2008/04/02 09:01
CRDT- 2008/04/02 09:00
PHST- 2008/04/02 09:00 [pubmed]
PHST- 2008/04/02 09:01 [medline]
PHST- 2008/04/02 09:00 [entrez]
AID - 10.1063/1.2894212 [doi]
PST - ppublish
SO  - Rev Sci Instrum. 2008 Mar;79(3):034703. doi: 10.1063/1.2894212.