TY - JOUR
T1 - Shock discontinuity in high-current vacuum arcs
AU - Gidalevich, Evgeny
AU - Goldsmith, Samuel
AU - Boxman, Raymond L.
N1 - Funding Information:
Manuscript received September 18, 2000; revised April 26, 2001. This work was supported in part by The Israel Science Foundation. E. Gidalevich was supported by the Israel Ministry of Absorption. The authors are with the Electrical Discharge and Plasma Laboratory, Department of Interdisciplinary Studies, Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel (e-mail: [email protected]). Publisher Item Identifier S 0093-3813(01)09250-5.
PY - 2001/10
Y1 - 2001/10
N2 - The deceleration of a cathode plasma jet caused by interaction with a secondary ion cushion at the anode is analyzed. Copper electrodes are considered. The secondary ions are assumed to be sputtered and/or reflected from the anode. The sputtering coefficient was found by integrating the energy distribution of the cathode spot plasma jet, weighed by the copper-copper self-sputtering yield. The system of equations of motion and continuity for the primary plasma jet and the secondary ions was solved numerically for arc current densities in the range of (3 × 10 4-5 × 10 5) A/m 2. It was found that for an interelectrode gap of 2 cm, and a secondary ion velocity of 10 3 m/s, there is no upper limit for the current density for continuous jet motion. For secondary ion velocities < 0.25 × 10 3 m/s, the upper limit is 10 5 A/m 2, above which a shock front forms between the primary and secondary plasma.
AB - The deceleration of a cathode plasma jet caused by interaction with a secondary ion cushion at the anode is analyzed. Copper electrodes are considered. The secondary ions are assumed to be sputtered and/or reflected from the anode. The sputtering coefficient was found by integrating the energy distribution of the cathode spot plasma jet, weighed by the copper-copper self-sputtering yield. The system of equations of motion and continuity for the primary plasma jet and the secondary ions was solved numerically for arc current densities in the range of (3 × 10 4-5 × 10 5) A/m 2. It was found that for an interelectrode gap of 2 cm, and a secondary ion velocity of 10 3 m/s, there is no upper limit for the current density for continuous jet motion. For secondary ion velocities < 0.25 × 10 3 m/s, the upper limit is 10 5 A/m 2, above which a shock front forms between the primary and secondary plasma.
KW - Hydrodynamicity of plasma
KW - Shock waves
KW - Vacuum arc
UR - http://www.scopus.com/inward/record.url?scp=0035485734&partnerID=8YFLogxK
U2 - 10.1109/27.964457
DO - 10.1109/27.964457
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AN - SCOPUS:0035485734
SN - 0093-3813
VL - 29
SP - 700
EP - 703
JO - IEEE Transactions on Plasma Science
JF - IEEE Transactions on Plasma Science
IS - 5 I
ER -