[Sneap] RF ion source (fwd)

[Edmund Myers]

This was a long time ago: I set up an old HVEC rf source in the terminal of
the FSU FN tandem, running on pure N_2, and obtained ~1mu-amp of N+. I did
not look for N++. But I guess, since the ratio of N+/(N_2)+ (i.e atomic
nitrogen ions to molecular nitrogen ions) was poor, ~5%, that the yield of
N++ would be very small, perhaps a few nA.
Hope this helps.

Dr. Edmund G. Myers
Research Scientist
Florida State University
Department of Physics
315 Keen Building
Tallahassee
FL 32306-4350
Tel. 850-644-4040 (lab. 850-645-1468)
fax 850-644-9848


-----Original Message-----
From: Powell E. Barber [mailto:barber at nucmar.physics.fsu.edu]
Sent: Wednesday, January 30, 2008 9:24 AM
To: Ed Myers
Subject: Re: [Sneap] RF ion source (fwd)


Ed,

This, from the SNEAP list.  I'm forwarding to you because I suspect you
are the one who made this happen and I didn't know if you monitored the
list or not.

Reply to sneap at tunl.duke.edu

Regards,

p.


---------- Forwarded message ----------
Date: Tue, 29 Jan 2008 15:56:31 -0800 (PST)
From: ThunderHooves <gharper at u.washington.edu>
Reply-To: Symposium of Northeastern Accelerator Personnel
    <sneap at tunl.duke.edu>
To: Symposium of Northeastern Accelerator Personnel <sneap at tunl.duke.edu>
Subject: Re: [Sneap] RF ion source


Like Chris, I have seen +1 N (as well as CO2, CO, O, O2, N2, OH, H2O) when I
had a tank gas leak. I never looked for higher charge states. The Florida
State boys did an experiment in a tandem with a RF terminal ion source
producing +1 15N. They might be the guys to contact.

Gregory C. Harper               Phone:(206) 543-4084 (Office)
Research Engineer/Scientist IV        (206) 543-4062 (Lab)
University of Washington        FAX:  (206) 685-4634
CENPA NPL Bldg.
Box 354290                      email: gharper at u.washington.edu
Seattle, WA 98195-4290

On Tue, 29 Jan 2008, Stephen Marino wrote:

> Does anyone have any experience in obtaining a nitrogen beam from an RF
> ion source? What is the highest charge state that has been obtained?
>
> Steve Marino
>
> --
> Stephen A. Marino
> Manager
> RARAF
> Columbia University
> P. O. Box 21/ 136 S. Broadway
> Irvington, NY  10533
> Tel.:  914-591-9244         Fax: 914-591-9405
> http://www.raraf.org/
>
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