THE NEUTRON TRANSMISSION THROUGH A CYLINDRICAL GUIDE TUBE

被引：16

作者：

MILDNER, DFR

CHEN, H

机构：

[1] Natl Inst of Standards and, Technology, Gaithersburg

来源：

JOURNAL OF APPLIED CRYSTALLOGRAPHY | 1994年 / 27卷

关键词：

D O I：

10.1107/S0021889893009847

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The transmission of neutrons or X-rays through a straight cylindrical channel can be determined for an input beam for which the beam divergence has azimuthal symmetry. For polar angles greater than the critical angle, the acceptance of trajectories is restricted and allowable trajectories are close to the perimeter of the channel. The distribution of available polar angles has been calculated, from which both the transmission and the beam profile as a function of distance from the end of the channel can be calculated as a function of polar angle. Since the distance between successive reflections can be determined, the number of reflections per unit length can be calculated as a function of polar angle. Hence, the distribution of the beam profile for nonperfect reflectivity can be determined.

引用

页码：316 / 325

页数：10

共 18 条

[1]

CARLILE CJ, 1979, RL79084 REP RUTH LAB

[2] THE LIQUID-HYDROGEN MODERATOR ON THE ZING-P' PULSED SPALLATION NEUTRON SOURCE [J].

CARPENTER, JM ;

KLEB, R ;

POSTOL, TA ;

STEFIUK, RH ;

MILDNER, DFR .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH, 1981, 189 (2-3) :485-501

[3] NEUTRON GUIDE TUBE GAIN FOR A REMOTE FINITE SOURCE [J].

CARPENTER, JM ;

MILDNER, DFR .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH, 1982, 196 (2-3) :341-348

[4] GUIDING AND FOCUSING NEUTRON BEAMS USING CAPILLARY OPTICS [J].

CHEN, H ;

DOWNING, RG ;

MILDNER, DFR ;

GIBSON, WM ;

KUMAKHOV, MA ;

PONOMAREV, IY ;

GUBAREV, MV .

NATURE, 1992, 357 (6377) :391-393

[5]

CHEN H, 1992, P SOC PHOTO-OPT INS, V1738, P395, DOI 10.1117/12.130649

[6]

DROUGARD R, 1967, ADV OPTICAL TECHNIQU

[7]

FARNOUX B, 1968, 1968 P S NEUTR IN SC, V2, P353

[8] A NEUTRON LENS [J].

KUMAKHOV, MA ;

SHAROV, VA .

NATURE, 1992, 357 (6377) :390-391

[9] MULTIPLE REFLECTION FROM SURFACE X-RAY OPTICS [J].

KUMAKHOV, MA ;

KOMAROV, FF .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1990, 191 (05) :289-350

[10] CHANNELING OF PHOTONS AND NEW X-RAY OPTICS [J].

KUMAKHOV, MA .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1990, 48 (1-4) :283-286

← 1 2 →