by National Aeronautics and Space Administration, for sale by the National Technical Information Service in Washington, Springfield, Va .
Written in English
|Statement||George X. Kambic and Walter M. Krawczonek ; Lewis Research Center.|
|Series||NASA technical memorandum ; NASA TM X-3485, NASA technical memorandum -- X-3485.|
|Contributions||Krawczonek, Walter M., United States. National Aeronautics and Space Administration., Lewis Research Center.|
|The Physical Object|
|Pagination||32 p. :|
|Number of Pages||32|
ION HEATING MECHANISM IN A MODIFIED PENNING DISCHARGE by J. Reece Roth Lewis Research Center SUMMARY Ions with Maxwellian energy distributions and kinetic temperatures up to 7 keV have been observed in a modified Penning discharge. Investigation of the plasma with capacitive probes at several azimuthal locations revealed two distinct spoke-like con-. A heavy ion beam probe system for investigation of a modified penning discharge / By George X. Kambic, joint author. Walter M. Krawczonek, Lewis Research Center. and United States. National Aeronautics and Space Administration. Abstract. A heavy ion beam probe (HIBP) diagnostic is a uniq-ue tool for plasma research in fusion facilities. It has been successfully realized up to now on a number of devices with magnetic confinement ranging from tokamaks and stellarators to variety mirrors. In principle, the HIBP method gives an opportunity to. Particle‐in‐cell simulations of anomalous transport in a Penning discharge Johan Carlsson1,4*, Igor Kaganovich1, Andrew Powis2, Yevgeny Raitses1, Ivan Romadanov3 and Andrei Smolyakov3 1Princeton Plasma Physics Laboratory, Princeton, New Jersey , U.S.A. 2Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey , U.S.A.
We demonstrate a pulse-probe method for measuring the ion-cloud rotation frequency in a Penning trap. We show that it is useful over a range of parameters not accessible to the photon correlation method of Dholakia et al. . In particular, the pulse-probe method works for larger clouds than the photon-correlation method. We show that the pulse-probe method measures the space Cited by: 3. A three-dimensional ion optical code IBSimu has been utilized for simulation and optimization the extraction system and ion beam acceleration to energy of keV. A magnetic low energy beam transport line consisting of two solenoids has been designed to match the beam with RFQ. TRACE 2D code was used to optimize Size: KB. The Penning Ionization Gauge, also known as cold cathode gauge is used to measure vacuum. High voltage between the anode and the cathode causes gas discharge Skip navigation. The ions, because of their large mass, are virtually unaffected by the magnetic field and travel directly to the cathode. Secondary electrons released from the cathode by ion bombardment serve to build up and maintain the discharge (Fig. 4). The discharge is generally not stable in crossed- field gauges.
Penning ionization is a form of chemi-ionization, an ionization process involving reactions between neutral atoms or molecules. The Penning effect is put to practical use in applications such as gas-discharge neon lamps and fluorescent lamps, where the lamp is filled with a Penning mixture to improve the electrical characteristics of the lamps. The investigations of discharge channels for ion beam transport show that preionization of the discharge channels with a UV laser can be an efficient way to direct and stabilize the discharge. Energization of electrons in a plasma beam entering a curved magnetic field. Electron‐Beam Probing of a Penning Discharge. using a heavy ion beam probe for a toroidal magnetically. Progress in research on open-ended magnetic traps p. 3 Long pulse operation on Tore-Supra: towards steady state p. 11 Applicability of heavy ion beam probing for stellarator W7-X p. Peculiarities of sectioned metal-hydride hollow cathode applying in penning discharge p. To a question on thermal protection of constructional.