[Lex Computer & Tech Group/LCTG] Fwd: Dan Kleppner
Richard Wagner
r.w.wagner at verizon.net
Mon Jun 30 11:38:40 PDT 2025
I too shall miss Dan very much. I did not know him until our encounters
during LCTG meetings. I enjoyed our conversations, together with
Charlie! One of the more memorable meetings was when we were at a LCTG
luncheon with our wives, the six of us sat together and all were able to
pass pleasantries with each other. He will be missed by many and I'm
sure his legacy will endure. So sad!!
-Dick
On 6/30/2025 2:14 PM, Shireen Ahmed via LCTG wrote:
> So sorry to hear about Dan's passing. I did not know him, just read
> about him, certainly a very accomplished scientist.
>
> - Shireen Ahmed
>
> On Mon, Jun 30, 2025 at 1:57 PM Michael Alexander via LCTG
> <lctg at lists.toku.us> wrote:
>
> I first encountered Dan when he was “Dr. Kleppner” to me — when he
> taught one-third of Harvard’s three-semester introductory physics
> sequence (he also was a member of Professor Norman Ramsey’s
> research group). It probably was the first formal course that Dan
> taught. He was a good lecturer; but what impressed me most
> strongly, then, was the sense of responsibility to students
> that he displayed when he lectured: he really *tried*.
>
> I therefore looked forward to each presentation Dan (no longer
> “Dr. Kleppner”) gave to our Computer Group, and never was
> disappointed.
>
> — Mike Alexander
>
>
> On Monday, June 30, 2025, 12:21 PM, Ted Kochanski via LCTG
> <lctg at lists.toku.us> wrote:
>
> 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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> --
> /Regards,/
> /Shireen Ahmed/
>
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