Behavior of relativistic electron beam in a gas-filled drift tube as a function of gas pressure

Merkel, G.; Litz, Marc; Roberts, H.; Smith, Michael; Still, G. W.; Miller, Robert B.; McCullough, W.F.

doi:10.1109/23.273521

Cited by 8 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An examination of the voltage and current waveforms for the Aurora diode ( Figure 3) indicates that the risetime of the primary pulse is typically around 90 ns. An examination of the photodiode data of the companion paper [9] indicates that risetimes of the order of 20 ns can be achieved by drifting the beam in air at pressures of nominally 50 mTorr. However, if it were possible to reduce the injected beam risetime to approximately 20 ns, the beam drifting techniques could further decrease the beam risetime into the desired range.…”

Section: Theoretical Discussionmentioning

confidence: 99%

Risetime sharpening using magnetic insulation in the aurora diode

Miller¹,

McCullough²,

Merkel

et al. 1993

IEEE Trans. Nucl. Sci.

Self Cite

View full text Add to dashboard Cite

Theoretical calculations indicate that Aurora diode geometrical reconfigurations that delay the onset of magnetic insulation should yield a decreased risetime. Experimentally these diode modifications have resulted in a decrease of the beam risetime from approximately 80 ns to 20 ns. * ne first portion Of this work was =med Out Corporation. Newington, VA. Figure 12. Detailed comparison of a fast-rising photodiode trace (PD5) with the diode voltage pulse P E) as measured by the electrostatic probe. (The initial spikes on the traces are fiducial markers.) This measured risetime (10 ns) was achieved by combining a "falsework" diode with drift tube nose erosion. See reference 9.

show abstract

Section: Theoretical Discussionmentioning

confidence: 99%

Risetime sharpening using magnetic insulation in the aurora diode

Miller¹,

McCullough²,

Merkel

et al. 1993

IEEE Trans. Nucl. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

New developments in pulsed power technology and associated electron beam transport mechanisms at the United Kingdom Atomic Weapons Establishment

Birrell

Carpenter²,

Cooper³

et al. 2000

IEE Symposium Pulsed Power 2000

View full text Add to dashboard Cite

Intense electron-beam ionization physics in air

et al. 2003

View full text Add to dashboard Cite

In this paper we study, experimentally and theoretically, the interactions of an intense electron beam with an initially-neutral background gas. The Naval Research Laboratory’s Gamble II generator [J. D. Shipman, Jr., IEEE Trans. Nucl. Sci. NS-18, 243 (1971)] was used to drive an annular 900 kV, 800 kA beam, whose effects on background air in the pressure range ∼0.01 to 10 Torr were studied. Experimental diagnostics included a sophisticated two-color interferometer for time-resolved measurements of the background electron density, B-dot monitoring of the global net current, and x-ray pinhole images of the beam location. Data obtained were compared to extensive simulations using three numerical models that incorporated complex beam physics, atomic processes, and the capability for simulating strongly-disturbed gases. Good simulation agreement with net current and electron density as a function of pressure was obtained using a scaled pressure. Simulated and experimental net current fractions (at peak beam current) for the 1–10 Torr collision-dominated transport regime were on the order of 10%, while ionization fractions after the beam pulse were 20% for 10 Torr, rising to nearly 100% at the lower pressure of 0.5 Torr. More advanced model development is underway to better understand the important physics of beam–gas interactions.

show abstract

Behavior of relativistic electron beam in a gas-filled drift tube as a function of gas pressure

Cited by 8 publications

References 7 publications

Risetime sharpening using magnetic insulation in the aurora diode

Risetime sharpening using magnetic insulation in the aurora diode

New developments in pulsed power technology and associated electron beam transport mechanisms at the United Kingdom Atomic Weapons Establishment

Intense electron-beam ionization physics in air

Contact Info

Product

Resources

About