ION–ION RECOMBINATION COEFFICIENT: I. CORRECTION FOR ION DISTRIBUTION AND DIFFUSION LOSSES IN PLANE PARALLEL ION CHAMBERS

1967 ◽  
Vol 45 (2) ◽  
pp. 429-437 ◽  
Author(s):  
S. McGowan
Keyword(s):  
Electrode Spacing ◽  
Recombination Coefficient ◽  
Correction Factors ◽  
Ion Distribution ◽  
Ion Density ◽  
Plane Parallel ◽  
Ion Recombination ◽  
Ion Chambers ◽  
Considerable Range ◽  
And Diffusion

Correction factors to measured values of the ion–ion recombination coefficient, which are required because of nonuniform ion density and diffusion losses, are calculated from computer solutions to the differential equation for simultaneous recombination and diffusion. Results for plane-parallel ion chambers are given as a function of ion age for an initially uniform ion distribution over a considerable range of ion density and electrode spacing, and for a collimated distribution for two particular combinations of ion density and electrode spacing. Corrections to be applied to some reported experimental ion–ion recombination coefficients are estimated.

Ion neutralization reactions in irradiated hydrogen chloride, hydrogen bromide, and nitrous oxide

1970 ◽  
Vol 48 (4) ◽  
pp. 598-602 ◽  
Author(s):  
D. E. Wilson ◽  
D. A. Armstrong
Keyword(s):  
Nitrous Oxide ◽  
Hydrogen Chloride ◽  
Hydrogen Bromide ◽  
Recombination Coefficient ◽  
X Rays ◽  
Ion Density ◽  
Ion Recombination ◽  
Three Body

Rates of ion neutralization have been measured in hydrogen chloride, hydrogen bromide, and nitrous oxide by collecting the ions remaining in a defined volume at various times after ionization by a pulse of 120 k.v.p. X-rays. Values of the total homogeneous ion-ion recombination coefficient, a, have been obtained for each gas over a range of pressures in the region 50 to 650 Torr. From a study of the effects of pressure and ion density, the relative rates of wall diffusion, mutual neutralization, and three-body neutralization have been deduced.

Ion recombination and polarity correction factors for a plane-parallel ionization chamber in a proton scanning beam

2017 ◽  
Vol 45 (1) ◽  
pp. 391-401 ◽  
Author(s):  
Małgorzata Liszka ◽  
Liliana Stolarczyk ◽  
Magdalena Kłodowska ◽  
Anna Kozera ◽  
Dawid Krzempek ◽  
...  
Keyword(s):  
Ionization Chamber ◽  
Correction Factors ◽  
Plane Parallel ◽  
Scanning Beam ◽  
Ion Recombination ◽  
Polarity Correction

Replacement correction factors for plane-parallel ion chambers in electron beams

2010 ◽  
Vol 37 (2) ◽  
pp. 461-465 ◽  
Author(s):  
Lilie L. W. Wang ◽  
David W. O. Rogers
Keyword(s):  
Electron Beams ◽  
Correction Factors ◽  
Plane Parallel ◽  
Ion Chambers

scholarly journals Structure of the heliosheath from HSTOF energetic neutral atoms measurements

2018 ◽  
Vol 618 ◽  
pp. A26 ◽  
Author(s):  
A. Czechowski ◽  
M. Hilchenbach ◽  
K. C. Hsieh ◽  
M. Bzowski ◽  
S. Grzedzielski ◽  
...  
Keyword(s):  
Energy Range ◽  
Ecliptic Plane ◽  
High Energy ◽  
Neutral Atoms ◽  
Ion Distribution ◽  
Ion Density ◽  
Heliospheric Observatory ◽  
Energetic Neutral Atoms ◽  
Time Periods ◽  
Ecliptic Longitude

Context. From the year 1996 until now, High energy Suprathermal Time Of Flight sensor (HSTOF) on board Solar and Heliospheric Observatory (SOHO) has been measuring the heliospheric energetic neutral atoms (ENA) flux between ±17° from the ecliptic plane. At present it is the only ENA instrument with the energy range within that of Voyager LECP energetic ion measurements. The energetic ion density and thickness of the inner heliosheath along the Voyager 1 trajectory are now known, and the ENA flux in the HSTOF energy range coming from the Voyager 1 direction may be estimated. Aims. We use HSTOF ENA data and Voyager 1 energetic ion spectrum to compare the regions of the heliosheath observed by HSTOF and Voyager 1. Methods. We compared the HSTOF ENA flux data from the forward and flank sectors of the heliosphere observed in various time periods between the years 1996 and 2010 and calculated the predicted ENA flux from the Voyager 1 direction using the Voyager 1 LECP energetic ion spectrum and including the contributions of charge exchange with both neutral H and He atoms. Results. The ratio between the HSTOF ENA flux from the ecliptic longitude sector 210−300° (the LISM apex sector) for the period 1996−1997 to the estimated ENA flux from the Voyager 1 direction is ∼1.3, but decreases to ∼0.6 for the period 1996−2005 and ∼0.3 for 1998−2006. For the flank longitude sectors (120−210° and 300−30°), the ratio also tends to decrease with time from ∼0.6 for 1996−2005 to ∼0.2 for 2008−2010. We discuss implications of these results for the energetic ion distribution in the heliosheath and the structure of the heliosphere.

Correction factors for calibration of plane-parallel ionization chambers with a60Co gamma-ray beam

1993 ◽  
Vol 38 (1) ◽  
pp. 39-54 ◽  
Author(s):  
R F Laitano ◽  
A S Guerra ◽  
M Pimpinella ◽  
H Nystrom ◽  
M Karlsson ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Correction Factors ◽  
Ionization Chambers ◽  
Plane Parallel
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