THE UNIVERSITY-OF-WASHINGTON AMS SYSTEM - A 6-YEAR TECHNICAL UPDATE

被引：3

作者：

SCHMIDT, FH

BROWN, TA

FARWELL, GW

GROOTES, PM

机构：

[1] UNIV WASHINGTON, DEPT GEOL SCI AJ-20, SEATTLE, WA 98195 USA

[2] UNIV WASHINGTON, NUCL PHYS LAB GL-10, SEATTLE, WA 98195 USA

[3] UNIV WASHINGTON, GEOPHYS PROGRAM AK-50, SEATTLE, WA 98195 USA

[4] UNIV WASHINGTON, QUATERNARY ISOTOPE LAB AK-60, SEATTLE, WA 98195 USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1990年 / 52卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0168-583X(90)90411-M

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We last described our system in detail at the third AMS conference in 1984. Since then numerous technical improvements have been made which have enhanced the stability of the system, and produced larger and sharper beams; the C-14 beam is now transmitted with 90-100% efficiency from the exit aperture of the inflection magnet to the C-14 detector, and the maximum counting rate for modern carbon has been increased from approximately 50/s to approximately 140/s. Improved sample preparation procedures have reduced our typical carbon samples from approximately 2 mg to approximately 0.4 mg.

引用

页码：229 / 232

页数：4

共 7 条

[1] NEGATIVE-ION TEST INJECTOR OF MUNICH MP TANDEM AND HICHONEX-836 SPUTTER SOURCE [J].