TY - JOUR
T1 - Thermodynamic state of the magnetic flux compression generator volume
AU - Neuber, Andreas
AU - Holt, Thomas
AU - Dickens, James C.
AU - Kristiansen, Magne
N1 - Funding Information:
Manuscript received September 28, 2002; revised August 15, 2002. This work was supported by the Explosive-Driven Power Generation MURI program funded by the Director of Defense Research and Engineering (DDR&E) and managed by the Air Force Office of Scientific Research (AFOSR).
PY - 2002/10
Y1 - 2002/10
N2 - The thermodynamic state of the gas trapped in the volume of helical magnetic flux compression generators was measured using optical emission spectroscopy and fast pressure probes. Three main stages of operation are discussed: 1) the initial stage, which can be represented by a freely expanding armature, that shows fairly low gas temperatures, as low as 2000 K; 2) the intermediate stage during 14-4 μs before generator burnout that exhibits mainly an atomic copper line transition at about 0.8 eV; 3) the last few μs that reveal a highly compressed gas with temperatures of about 5000 K and pressures of about 1500 bar. Most experiments were conducted in air, initially at STP, some results are given for argon and sulfur hexafluoride initially at one atmosphere. Additionally, the thermodynamic state is linked to the electrical volume breakdown threshold via simple resistance measurements that were conducted in current-free flux compression generators.
AB - The thermodynamic state of the gas trapped in the volume of helical magnetic flux compression generators was measured using optical emission spectroscopy and fast pressure probes. Three main stages of operation are discussed: 1) the initial stage, which can be represented by a freely expanding armature, that shows fairly low gas temperatures, as low as 2000 K; 2) the intermediate stage during 14-4 μs before generator burnout that exhibits mainly an atomic copper line transition at about 0.8 eV; 3) the last few μs that reveal a highly compressed gas with temperatures of about 5000 K and pressures of about 1500 bar. Most experiments were conducted in air, initially at STP, some results are given for argon and sulfur hexafluoride initially at one atmosphere. Additionally, the thermodynamic state is linked to the electrical volume breakdown threshold via simple resistance measurements that were conducted in current-free flux compression generators.
KW - Conductivity measurement
KW - Electric breakdown
KW - Electroexplosive devices
KW - Magnetic flux compression
KW - Shocked gas
UR - http://www.scopus.com/inward/record.url?scp=0036826707&partnerID=8YFLogxK
U2 - 10.1109/TPS.2002.805396
DO - 10.1109/TPS.2002.805396
M3 - Article
AN - SCOPUS:0036826707
SN - 0093-3813
VL - 30
SP - 1659
EP - 1664
JO - IEEE Transactions on Plasma Science
JF - IEEE Transactions on Plasma Science
IS - 5 I
ER -