Achim W. Weidemann's Home Page

How to reach me (normally):
• Phone: Office:       650-926-3391       Fax: 650-926-2136
• e-mail:                 achim -at- SLAC.Stanford.EDU
  
• Alternate e-mail: achimww -at- gmail.com
  
• SLAC National Accelerator Laboratory*
  2575 Sand Hill Road, Mail Stop 40
  Menlo Park, CA 94025
  * [formerly Stanford Linear Accelerator Center ]
  
  My resume, in PDF ( 2 pages, 43 kB) or txt (2 pages, 8 kB); with a list of publications appended: PDF (107 kB, 10 p.)
  

• background calculations for the Interaction Region design of SuperB , a planned 'Super Flavor Factory,' which, if built, will continue the research done at BaBar with even higher luminosities;
• design and construction of FACET project which will use the the SLAC Linear Collider SLC for innovative accelerator experiments.
• and other projects, such as ILC Vibration Studies (Measurements with geophones to determine how various structures transmit vibrations to focussing magnets supported by them).

Before that, I was a High-Energy Particle Physicist and spent the last 20+ years doing research at SLAC (most recently, as a Research Professor at the University of South Carolina , and before that, at the University of Tennessee, always permanently stationed at SLAC).
Then I worked on:

• BaBar at the PEP-II Asymmetric B-Factory, a high-statistics study of decays of the b-quark, and also on
• E-166, an experiment studying the undulator-based production of polarized positrons for the International Linear Collider. at the FFTB (Final Focus Test Beam),
• other future International Linear Collider physics and machine studies, and on
• Research on a Pulse-to-Pulse Emittance Measurement System (a Phase II SBIR [Small Business Innovation Research]/ CRADA [Cooperative Research and Development] Project of SLAC and FarTech, Inc., San Diego, CA (A `Quad Cavity' has been designed, produced, bench tested, tuned and installed in the NLCTA beam line, where data were taken in July, 2002. (See Photo of Quad Cavity ) (Results published in Review of Scientific Instruments, work on other cavities continues).

• Fifth Rencontres du Vietnam , Hanoi, Vietnam, August 6-11, 2004;
  Conference Contribution: Polarized Positrons at a Future Linear Collider and the Final Focus Test Beam,
  SLAC-PUB-10842, [ ps 775 kB or pdf 281 kB]; talk: [Powerpoint, 2.7 MB] .
• International Conference on High-Energy Physics, ICHEP 04, Beijing, August 15-25, 2004
  Contributed Paper: Polarized Positrons at a Future Linear Collider and the Final Focus Test Beam,
  SLAC-PUB-10581, July 2004 [ ps 1.3MB | pdf 311 kB ] to go with a poster [ Power Point, 2.5 MB]
• Fifth International Workshop on Electron-Electron Interactions at TeV Energies, e-e-03, UC Santa Cruz, December 12-14, 2003. Another contribution on Polarized Positrons.
• American Linear Collider Workshop at Cornell, 13-16 July 2003..
  Electroweak Working Group talk, Polarised Positrons at a Linear Collider and E166 [ pdf]
• Meeting of the Division of Particles and Fields of the APS, Williamsburg, May 24-28, 2002;
  Charm Parallel Session talk, Limits on D0 Mixing, [ pdf or Powerpoint]
• Fourth Workshop on Electron-Electron Collisions at TeV Energies e-e-'01 UC Santa Cruz, 7-9 December 2001.
  Contribution on Plasma Lens Backgrounds.

If you didn't see me at SLAC during spring/summer 2000, it is because I was away during some time:
• 18 to 30 July, 2000 I attended the IVth Rencontres du Vietnam conference, Physics at Extreme Energies (Particle Physics and Astrophysics), Hanoi (July 19-25, 2000),Vietnam
  Contributed talk, Final Results on Electroweak Asymmetries from SLD [ HTML Slide Show (17 slides) or as the paper for the proceedings, SLAC-PUB-8689 ] .
  This visit was made possible by a small travel grant from the National Science Foundation.
  I also visited about all Physics Institutions in Hanoi, and talked to physicists from almost all other universities or Institutes in Vietnam (e.g. TPHCM, Dalat; listed here ) and to some from neighboring countries. (Send me e-mail if interested in collaborating with physicists in Vietnam, or want to recruit graduate students or postdocs from there).
• March 6 to May 22, 2000 I was at the Research Center for Neutrino Science of Tohoku University in Sendai, Japan, where I worked on KamLand ( Japanese) (refurbishing big Phototubes).
• Older e-e- and Photon Collider Contributions

I came to SLAC in 1984, and worked until 2001 for the University of Tennessee (most recently as Research Professor). Then I worked at SLAC on:

• SLD at the SLC (Stanford Linear Collider), a study of e⁺e^- collisions at the Z⁰ energy (last run ended 6/1998, now analysing data);
• BaBar at the PEP-II Asymmetric B-Factory, especially measurements of PEP-II backgrounds (before BaBar was installed).
• E-150, a Plasma Lens Experiment at the FFTB (First run in June 1999, completed data taking summer 2000; results published).
• E-144 at the FFTB (Final Focus Test Beam), a test of nonlinear Quantum Electrodynamics in Laser-electron-beam scattering (data-taking and analysis completed, see E-144 web site for publications and even references in the popular press);
• Research on a Pulse-to-Pulse Emittance Measurement System (a Phase II SBIR [Small Business Innovation Research]/ CRADA [Cooperative Research and Development] Project of SLAC and FarTech, Inc., San Diego, CA (A `Quad Cavity' has been designed, produced, bench tested, tuned and installed in the NLCTA beam line, where first data were taken in July, 2002. (See Photo of Quad Cavity )
• T-423, a characterization of the FFTB (Final Focus Test Beam), 'parasitic' electron beam (generated by conversion of photons made by SLC collimators while SLC is running for SLD), and a measurement of neutron energy spectra generated by electron beams in thick targets (Data taken in August and November 1997).

and in Japan:

• KamLand, an experiment searching for neutrino oscillations by looking for such particles in a swimming pool filled with water and a balloon full of scintillating fluid, installed deep underground in the Kamioka mine (Gifu Prefecture).
  

...and (at some time in the past, at reduced effort) at Fermilab :

• MINIMAX (T864) at the C0 interaction region of the Tevatron , a 'Search for the disoriented chiral condensate' (whatever that may be), which may be considered to be a prototype of a 'Full-Acceptance' experiment (T864 data taking has been completed, and apparatus dismantled to make way for other projects at C0, such as BTeV. [which was unfortunately canceled in 2005]) (See below for more info on C0 and FAD.)

Finally, I work on design studies and proposals for the following (far?) future projects:

• Physics at a future International Linear collider (see also ILC at SLAC and the former NLC page ), in particular the possible option of a
  Gamma-Gamma (Photon-Photon) (and also e-photon, e¯e¯) Collider at a second Interaction region at the NLC (see gg/eg/e-e- Study Group Home Page or ZDR Appendix B (compressed PS file, 1.29M) for more info.

The next three proposals have unfortunately since been rejected or abandoned (but might resurface in a different form elsewhere):

• Further experiments at the Tevatron C0 interaction region (where MINIMAX/T864 had been done); in particular the 'ZERODEG' proposal (submitted Sep-97, rejected by PAC.[BTeV was to use the C0 Interaction region, but was unfortunately cancelled {much} later as well]).
• 'Full Acceptance Detector' Physics at a high-energy hadron collider, such as FELIX at the LHC at CERN (CERN User Page) (Unfortunately, also not approved). (A 'Full-Acceptance Detector' had first been considered for the now defunct SSC [Superconducting Super Collider].) Now we should do forward physics at HERA, or at the other LHC experiments, where at ALICE or CMS the
  CASTOR Project had been proposed (pdf EoI)
• Neutron-Antineutron Oscillation experiments (at nuclear reactors, such as an upgraded HFIR [High-Flux Isotpe Reactor] at ORNL [Oak Ridge National Laboratory]).

Various:

Resumes/Publications: