Measurement of the pressure differences in a large chamber where the pressure is generated dynamically

Peksa, L.; Gronych, T.; Řepa, P.; Tesař, Jiří

doi:10.1016/s0042-207x(02)00222-1

Cited by 8 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Jitschin and Reich [2], in common vacuum metrology the Maxwellian distribution can be applied for deriving pressures in the molecular regime with high accuracy. Pressure differences of the order of a few percent between various positions for gauges were also measured experimentally by Repa et al [3] and Peksa et al [4] in the pressure range from 10 À3 to 10 À1 Pa. They used a spinning rotor gauge (SRG) and two ionization gauges for the pressure measurements during their experiments.…”

Section: Introductionmentioning

confidence: 88%

“…If the readings of CDG 1 A are q 1 times higher than CDG 3 E and Dp greater; where q 1 is the ratio between pressures of these CDGs then [4],…”

Section: Theory and Data Analysismentioning

confidence: 99%

“…In an ideal case, if the pressure inside the chamber is same in two pressure limits then the constant Fq has to satisfy the condition as follows [4]:…”

Section: Theory and Data Analysismentioning

confidence: 99%

See 2 more Smart Citations

Accurate measurement of pressure differences and the effect of baffle on pressure distribution in vacuum chamber during dynamic gas flow

Khan

Choi

Lim

et al. 2010

Current Applied Physics

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 88%

“…If the readings of CDG 1 A are q 1 times higher than CDG 3 E and Dp greater; where q 1 is the ratio between pressures of these CDGs then [4],…”

Section: Theory and Data Analysismentioning

confidence: 99%

See 1 more Smart Citation

Accurate measurement of pressure differences and the effect of baffle on pressure distribution in vacuum chamber during dynamic gas flow

Khan

Choi

Lim

et al. 2010

Current Applied Physics

View full text Add to dashboard Cite

“…The apparatus was based on equipment (pumped by rotary and turbomolecular pump) that enabled exact adjustment of a stable working pressure in the dynamic regime that was used in other experiments for metrology purposes [17,18]. We utilized the possibility of exact adjustment of the pressure to determine whether various values of the working pressure could affect the results of the experiment (e.g., influence of residual gas ionization on measured currents).…”

Section: Methodsmentioning

confidence: 99%

Experimental Test of the Evans’ B(3)-Field: Measuring the Interaction with Free Electrons

et al. 2009

View full text Add to dashboard Cite

During the past decade, M.W. Evans and his coworkers have been developing so-called "Evans" or "ECE theory" that intends to serve as an unified field theory. One of its predictions is an existence of a radiation magnetic field called a "B(3)-field" which should accompany a circularly polarized electromagnetic radiation. This field should affect free electrons in two ways: (1) the electrons should behave in the B(3)-field in the same way as in a classical magnetic field (i.e., Larmor precession) and moreover, (2) the electrons should undergo quantum interaction with the B(3)-field with the formation of a spin connection resonance. This paper presents an experimental test of the B(3)-field existence by observing the changes in trajectories of free electrons in special detector, when strong (up to 200 W/m 2 ) continuous circularly polarized microwave radiation of a frequency of 2.45 GHz is applied. We have not detected any sign of B(3)-field in presented experiment. It follows that if the B(3)-field really exists, it should be at least 4 orders of magnitude smaller than the Evans' theory predicts.

show abstract

“…In order to suppress the influence of sources of non-equilibrium and pressure nonuniformity, the chamber has to have a suitable shape, it has to be sufficiently large, the gas after admission should be scattered by impinging on the walls, etc [8]. The stream of gas is scattered in order to achieve a uniform pressure distribution [2].…”

Section: ⅰ Introductionmentioning

confidence: 99%

A Study of Non-uniform Pressure Distribution in Vacuum Chamber during Dynamic Gas Flow

Khan¹,

Hong²,

Hong³

2009

Journal of the Korean Vacuum Society

View full text Add to dashboard Cite

Vacuum chambers have wide application for a variety of purposes such as material processing, vacuum gauge calibration, etc. As the dynamic pressure generated in such chamber is non-uniform, in many industrial as well as research processes, it is vital to know the non-uniform gas distribution with associated gas flow regimes and the ways of minimizing these pressure non-uniformities. In the present work, the behavior of gas flow in a vacuum chamber, during continuous gas flow, is described in the pressure range 0.1-133 Pa and the effect of baffle plate in minimizing the pressure non-uniformities is investigated. It was observed that maximum deviations in the pressure occur near the gas inlet point and that the effect of baffle plate in minimizing the pressure non-uniformities is more obvious in the transitional flow regime.

show abstract

Measurement of the pressure differences in a large chamber where the pressure is generated dynamically

Cited by 8 publications

References 3 publications

Accurate measurement of pressure differences and the effect of baffle on pressure distribution in vacuum chamber during dynamic gas flow

Accurate measurement of pressure differences and the effect of baffle on pressure distribution in vacuum chamber during dynamic gas flow

Experimental Test of the Evans’ B(3)-Field: Measuring the Interaction with Free Electrons

A Study of Non-uniform Pressure Distribution in Vacuum Chamber during Dynamic Gas Flow

Contact Info

Product

Resources

About