The LLNL ion source - past, present and future

I. D. Proctor; J. R. Southon; M. L. Roberts; J. C. Davis; D. W. Heikkinen; T. L. Moore; J. L. Garibaldi; T. A. Zimmerman

doi:10.1016/0168-583X(90)90432-T

The LLNL ion source - past, present and future

I. D. Proctor
, J. R. Southon
, M. L. Roberts
, J. C. Davis
, D. W. Heikkinen
, T. L. Moore
, J. L. Garibaldi
, T. A. Zimmerman

Lawrence Livermore National Laboratory

Research output: Contribution to journal › Article › peer-review

Abstract

The Multi-user Tandem Laboratory (MTL) at LLNL is a general purpose laboratory for analysis using ion beam techniques. Our initial interest in AMS was for large throughput with modest precision. Toward this goal, we purchased a prototype GIC spherical ionizer source with a 60 sample cassette changer. The source has been extensively modified to increase reliability and to adapt it for AMS operation. The sample changing mechanism was completely rebuilt, pumping was increased in critical areas, electrical stress has been reduced in areas where failures were frequent and protection of insulators from cesium vapor has been increased. We are limiting the divergence to 20 mrad to match the present injection system and are only able to get about 50 μA of stable carbon beam in this configuration. Details of failures, changes to date and planned improvements will be discussed.

Original language	English
Pages (from-to)	334-337
Number of pages	4
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	52
Issue number	3-4
DOIs	https://doi.org/10.1016/0168-583X(90)90432-T
Publication status	Published - 2 Dec 1990
Externally published	Yes

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10.1016/0168-583X(90)90432-T

Cite this

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title = "The LLNL ion source - past, present and future",

abstract = "The Multi-user Tandem Laboratory (MTL) at LLNL is a general purpose laboratory for analysis using ion beam techniques. Our initial interest in AMS was for large throughput with modest precision. Toward this goal, we purchased a prototype GIC spherical ionizer source with a 60 sample cassette changer. The source has been extensively modified to increase reliability and to adapt it for AMS operation. The sample changing mechanism was completely rebuilt, pumping was increased in critical areas, electrical stress has been reduced in areas where failures were frequent and protection of insulators from cesium vapor has been increased. We are limiting the divergence to 20 mrad to match the present injection system and are only able to get about 50 μA of stable carbon beam in this configuration. Details of failures, changes to date and planned improvements will be discussed.",

author = "Proctor, \{I. D.\} and Southon, \{J. R.\} and Roberts, \{M. L.\} and Davis, \{J. C.\} and Heikkinen, \{D. W.\} and Moore, \{T. L.\} and Garibaldi, \{J. L.\} and Zimmerman, \{T. A.\}",

year = "1990",

month = dec,

day = "2",

doi = "10.1016/0168-583X(90)90432-T",

language = "English",

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pages = "334--337",

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TY - JOUR

T1 - The LLNL ion source - past, present and future

AU - Proctor, I. D.

AU - Southon, J. R.

AU - Roberts, M. L.

AU - Davis, J. C.

AU - Heikkinen, D. W.

AU - Moore, T. L.

AU - Garibaldi, J. L.

AU - Zimmerman, T. A.

PY - 1990/12/2

Y1 - 1990/12/2

N2 - The Multi-user Tandem Laboratory (MTL) at LLNL is a general purpose laboratory for analysis using ion beam techniques. Our initial interest in AMS was for large throughput with modest precision. Toward this goal, we purchased a prototype GIC spherical ionizer source with a 60 sample cassette changer. The source has been extensively modified to increase reliability and to adapt it for AMS operation. The sample changing mechanism was completely rebuilt, pumping was increased in critical areas, electrical stress has been reduced in areas where failures were frequent and protection of insulators from cesium vapor has been increased. We are limiting the divergence to 20 mrad to match the present injection system and are only able to get about 50 μA of stable carbon beam in this configuration. Details of failures, changes to date and planned improvements will be discussed.

AB - The Multi-user Tandem Laboratory (MTL) at LLNL is a general purpose laboratory for analysis using ion beam techniques. Our initial interest in AMS was for large throughput with modest precision. Toward this goal, we purchased a prototype GIC spherical ionizer source with a 60 sample cassette changer. The source has been extensively modified to increase reliability and to adapt it for AMS operation. The sample changing mechanism was completely rebuilt, pumping was increased in critical areas, electrical stress has been reduced in areas where failures were frequent and protection of insulators from cesium vapor has been increased. We are limiting the divergence to 20 mrad to match the present injection system and are only able to get about 50 μA of stable carbon beam in this configuration. Details of failures, changes to date and planned improvements will be discussed.

UR - https://www.scopus.com/pages/publications/0007192333

U2 - 10.1016/0168-583X(90)90432-T

DO - 10.1016/0168-583X(90)90432-T

M3 - Article

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SN - 0168-583X

VL - 52

SP - 334

EP - 337

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

IS - 3-4

ER -

The LLNL ion source - past, present and future

Abstract

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