[Lex Computer & Tech Group/LCTG] Fwd: Dan Kleppner

[Ted Kochanski]

All,


I met Dan when I was an MIT undergraduate -- long before I knew of the
existence of the LCTG

Dan also was sort of the Intellectual Grandfather to my brother Greg for
his Ph.D. research "Magnetic Trapping and Cooling of Atomic Hydrogen" MIT
1987

Dan founded the lab and pioneered the cooling process that my brother used
for his work with Spin Polarized Hydrogen
see for example:

Magnetic Trapping of Spin-Polarized Atomic Hydrogen
Harald F. Hess, Greg P. Kochanski, John M. Doyle, Naoto Masuhara, Daniel
Kleppner and Thomas J. Greytak
Copyright (c) 1987 The Japan Society of Applied Physics
Japanese Journal of Applied Physics, Volume 26, Number S3-1
Citation Harald F. Hess et al 1987 Jpn. J. Appl. Phys. 26 237
DOI 10.7567/JJAPS.26S3.237

and

Evaporative Cooling of Spin-Polarized Atomic Hydrogen
Naoto Masuhara, John M. Doyle, Jon C. Sandberg, Daniel Kleppner, Thomas J.
Greytak, Harald F. Hess and Greg P. Kochanski
Publisher website
21 August 1988
Published by American Physical Society (APS) in Physical Review Letters
Vol. 61  (8) , 935-938
https://doi.org/10.1103/physrevlett.61.935

and

“Temperature and magnetic field dependence of three-body recombination in
spin polarized hydrogen;”
H. F. Hess, D. A. Bell, G. P. Kochanski, D. A. Kleppner, T. J. Greytak,
1984 Phys. Rev. Lett. 52, 1520–1523

and

“Observation of three-body recombination in spin-polarized hydrogen;” H. F.
Hess,
D. A. Bell, G. P. Kochanski, R. W. Cline, D. A. Kleppner, T. J. Greytak,
1983
Phys. Rev. Lett. 51, 483–486.

Ted

On Mon, Jun 30, 2025 at 8:41 AM Steve Isenberg via LCTG <lctg at lists.toku.us>
wrote:

> Sad news.  He will be missed.
>
> ---------- Forwarded message ---------
> From: Bea Kleppner <bkleppner at gmail.com>
> Date: Sun, Jun 29, 2025 at 11:42 PM
> Subject: Dan Kleppner
> To: Steve Isenberg <smisenberg at gmail.com>
>
>
>
> Dear Steve,
> I am so sorry to write you the
> sad news that my Dan  unexpectedly died at Stanford hospital in California
> on June 16
> Dan and I were in Palo Alto
> to attend  our grandson Darwin's high school graduation.
>
> On Father's Day Dan enjoyed his favorite meal in Sofie's pretty garden.
> His last words were a toast to honor Darwin and the young generation who,
> he said, will be doing exciting new things.
> Then he collapsed. Despite CPR and ambulance to hospital, he did not
> regain consciousness.
> A link to his obituary in the Washington Post  is below. A memorial will be
> held probably at MiT. I will let you know.
> There is solace in the long and happy life we had together and with his
> friends.He very much enjoyed his associattion with the  Lexington computer
> and technology group.
> He enjoyed life and was optimistic to the end.
>
> Sadly,
> Beatrice Kleppner
>
>
> Sent from my iPhone
>
>
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