Zobrazeno 1 - 10
of 46
pro vyhledávání: '"H. J. Halama"'
Autor:
Giuseppe Ruoso, Yannis K. Semertzidis, F. A. Nezrick, E. Zavattini, P. Micossi, H. J. Halama, G. Cantatore, A. C. Melissinos, A. G. Prodell, Ross Cameron, Carlo Rizzo, D. M. Lazarus
Publikováno v:
Physics Letters A. 157:125-128
Using a sensitive ellipsometer we have measured the Cotton-Mouton constant of helium at 514.5 nm. We have found that, at 1 atm and 0°C,C CM (He) = (3.5 ± 0.7) × 10 -20 G -2 cm -1 . Our experimental value is compatible within the errors with previo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d95044a4b707a4fc1d2711c9ffc38d0c
https://doi.org/10.1016/0375-9601(91)90083-k
https://doi.org/10.1016/0375-9601(91)90083-k
Autor:
D. M. Lazarus, C. Rizzo, A. C. Melissinos, Giuseppe Ruoso, Ross Cameron, F. A. Nezrick, E. Zavattini, G. Cantatore, Yannis K. Semertzidis, A. G. Prodell, H. J. Halama
We have searched for light scalar and/or pseudoscalar particles that couple to two photons by studying the propagation of a laser beam ($\ensuremath{\lambda}=514$ nm) through a transverse magnetic field. A limit of 3.5\ifmmode\times\else\texttimes\fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::46565f01e68da42b8d6959e358327f1d
https://hdl.handle.net/11368/1691887
https://hdl.handle.net/11368/1691887
Autor:
Ross Cameron, F. A. Nezrick, H. J. Halama, A. G. Prodell, Giuseppe Ruoso, A. C. Melissinos, E. Zavattini, Giovanni Cantatore, Yannis K. Semertzidis, Carlo Rizzo, D. M. Lazarus
We searched for light scalars/pseudoscalars (e.g., axions) that couple to two photons using three different techniques: 1) Optical rotation, where a polarized laser beam enters a dipole magnetic field region. The production of scalars/pseudoscalars h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ccf5005ae3cc2356f242b566002f8ab
http://hdl.handle.net/11368/1901937
http://hdl.handle.net/11368/1901937
Autor:
H. J. Halama, A. G. Prodell, D. M. Lazarus, Yannis K. Semertzidis, F. A. Nezrick, A. C. Melissinos, Giuseppe Ruoso, G. Cantatore, C. Rizzo, E. Zavattini, Ross Cameron
We have searched for the regeneration of photons propagating in a transverse magnetic field. Such an effect would reveal the existence of light scalar or pseudoscalar particles such as the axion that couple to two photons. We obtain for this coupling
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca6691d6f448663a595defb4209ef832
https://hdl.handle.net/11368/1901931
https://hdl.handle.net/11368/1901931
Autor:
J. T. Rogers, A. G. Prodell, G. Cantatore, C. Rizzo, F. A. Nezrick, H. J. Halama, Ross Cameron, E. Zavattini, Yannis K. Semertzidis, A. C. Melissinos
We constructed a sensitive ellipsometer to study extremely small ellipticities that are acquired by laser light when it traverses a multipass optical cavity in a 9-m-long superconducting magnet. This setup was used to measure the Cotton–Mouton cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::706d600cad2b91cf852d2b3ffdacb17c
https://hdl.handle.net/11368/1691884
https://hdl.handle.net/11368/1691884
Autor:
Yannis K. Semertzidis, G. Cantatore, F. A. Nezrick, A. G. Prodell, H. J. Halama, Carlo Rizzo, J. T. Rogers, Ross Cameron, E. Zavattini, A. C. Melissinos
Publikováno v:
Physical review letters. 64(25)
We are searching for the coherent production of light pseudoscalar or scalar particles in a 12-m optical cavity placed in a 5-T transverse magnetic field. From the level of the observed optical rotation we have set a limit on the coupling of such par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ee2df36703b828f818ab67011ee3b1d
https://pubmed.ncbi.nlm.nih.gov/10041866
https://pubmed.ncbi.nlm.nih.gov/10041866
Autor:
J. B. Murphy, H. J. Halama
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 10:2082-2084
Photon stimulated desorption, PSD, is the major source of the gas load in electron storage rings and therefore strongly influences both beam lifetime and beam quality. The 200 MeV compact ring at the NSLS is an ideal tool to study PSD since its energ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::824ea6f42bb113cbafb2ad84a9548aab
https://doi.org/10.1116/1.578029
https://doi.org/10.1116/1.578029
Publikováno v:
Journal of Vacuum Science and Technology. 14:1201-1204
We have investigated the pumping speed as well as the liquid helium and liquid nitrogen consumption of a large‐capacity, all aluminum cryocondensation pump having a projected area of 0.9 m2 and real area of 1.15 m2. The liquid‐helium‐cooled sur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0064833b36c98fb3d4100482a91ee8a4
https://doi.org/10.1116/1.569385
https://doi.org/10.1116/1.569385
Autor:
W. U. Wuensch, H. J. Halama, Yannis K. Semertzidis, J. T. Rogers, F. A. Nezrick, W. B. Fowler, A. G. Prodell, B. Moskowitz, A. C. Melissinos, S. De Panfilis-Wuensch
Publikováno v:
Physical Review D. 40:3153-3167
A microwave cavity experiment designed to search for the signal from cosmic axions converting in an external magnetic field covered the mass range (4.5-16.3)\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}6}$ eV, corresponding to the frequency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b9bf4094aebfae51dda634f1acfcd1d
https://doi.org/10.1103/physrevd.40.3153
https://doi.org/10.1103/physrevd.40.3153
Autor:
J. R. Aggus, H. J. Halama
Publikováno v:
Journal of Vacuum Science and Technology. 11:333-336
The experimental data on helium adsorption isotherms for molecular sieve have been extended from 10−7 to 10−11 Torr. A commercially available cryopump CVR 1008 made by Excalibur was used for this investigation. It was found that, in general, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3690a11a7bd36ed8e93b68e43c615b44
https://doi.org/10.1116/1.1318611
https://doi.org/10.1116/1.1318611