RAL ion source R&D

Friday 15 Jul 2011, 15:00 → 16:30 Europe/London

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Reference materials, useful articles

collection of articles sent by colleagues for this meeting

1 Summary of the Los Alamos experience with Penning SPS scaling

Slides RSI_1994_Vol_65_pp_123-128.pdf

2 2 (of many) papers covering diagnostic measurements of the Penning source done at Los Alamos back in the 80's and 90's

These first 2 papers describe the optical emission spectroscopy measurements made on the LANL version of the original Dudnikov-type Penning source (what we call the 1X source) and the 4X source, a scaled-up version of the 1X source. Also detailed in these 2 papers is the analysis used to extract the plasma density, electron temperature, and the H-atom density as a function of the discharge current. The first paper (IEEE Trans Nucl Sci, NS-32, 1985, 1736-8) was presented at the 1985 Particle Accelerator Conference in Vancouver. The second paper (AIP Conf Proc No 158_1987_181-193) was presented at the 1986 Brookhaven conference on negative ion sources. Vernon

Slides AIP_Conf_Proc_No_158_1987_181-193.pdf IEEE_Trans_Nucl_Sci,_NS-32,_1985,_1736-8.pdf

3 2 more papers covering diagnostic measurements of the Penning source done at Los Alamos (and Berkeley) back in the 80's and 90's

These second 2 papers describe the VUV absorption spectroscopy measurements made on the LANL 4X source, a scaled-up version of the original Dudnikov-type Penning source. These measurements were made at LBNL. We extracted H-atom temperatures and densities as a function of several source parameters from these measurements. The first paper (RSI_1990_0424) was presented at the 1989 International Conference on Ion Sources at Berkeley. The second paper (AIP Conf Proc No 210_1990_462-473) was presented at the 1989 Brookhaven conference on negative ion sources. Vernon Smith

Slides AIP_Conf_Proc_No_210_1990_462-473.pdf RSI_1990_0424.pdf

4 2 more papers covering diagnostic measurements of the Penning source done at Los Alamos back in the 80's and 90's

These third 2 papers describe the H- temperature measurements made on the LANL 8X source, a scaled-up version of the LANL 4X source. We measured H- temperature as a function of several source parameters in these studies. The first paper (RSI_1991_2314) was presented at the 1991 Particle Accelerator Conference in San Francisco. The second paper (RSI_1992_2723) was presented at the 1991 International Conference on Ion Sources in Bensheim. Vernon Smith

Slides RSI_1991_2314.pdf RSI_1992_2723.pdf

5 seventh paper covering diagnostic measurements of the Penning source done at Los Alamos back in the 80's and 90's

This paper describes the optical emission measurements made on the LANL 8X source, a scaled-up version of the LANL 4X source. We measured the spatial distributions of the H, Cs, and Mo atoms and the Cs ions in this work. The attached paper (RSI_1991_2307) is an expanded version of the paper presented at the 1990 European Particle Accelerator Conference in Nice. Vernon Smith

Slides RSI_1991_2307.pdf

6 8th paper (RSI_1993_1394) describes our attempts to reduce the electrons extracted from the LANL 8X source

This 8th paper (RSI_1993_1394) describes our attempts to reduce the electrons extracted from the LANL 8X source, a scaled-up version of the LANL 4X source. We were able to reduce the e-/H- ratio to 0.9/1 by use of a conical collar. Vernon Smith

Slides RSI_1993_1394.pdf

7 9th paper (RSI_1995_1024) describes our attempts to chop the H- beam from the LANL 8X source

This 9th paper (RSI_1995_1024) describes our attempts to chop the H- beam from the LANL 8X source, a scaled-up version of the LANL 4X source. Although we were able to use a pulsed collar to chop the H- beam, the fall times and rise times of the chopped pulses were too long to be of use in the intended application. This study is the closest we came to using a "Langmuir probe" in our diagnostic work - the independently biased collar (Figure 1) can be thought of as a crude Langmuir probe - we even got a "Langmuir-probe-like" V vs I curve from the independently biased collar (Figure 3). So, it is likely that a Langmuir probe can be made to work in a Penning source. Vernon Smith

Slides RSI_1995_1024.pdf

Presentations for the meeting