Joseph Weber

For other people named Joseph Weber, see Joseph Weber (disambiguation).
Joe Weber

Joseph Weber (1919–2000). Depicted in US Naval Academy uniform in 1940.
Born (1919-05-17)May 17, 1919
Paterson, New Jersey, USA
Died September 30, 2000(2000-09-30) (aged 81)
Pittsburgh, Pennsylvania
Resting place United States Naval Academy, Annapolis, Maryland [1]
Residence USA
Nationality American
Fields Physicist
Institutions University of Maryland College Park
Institute for Advanced Study, Princeton
US Navy Bureau of Ships
Alma mater United States Naval Academy
Naval Postgraduate School
The Catholic University of America
Doctoral advisor Keith J. Laidler
Doctoral students Walter Beam
Urs Hochuli
Robert L. Forward
Joel Sinsky
Known for Weber bars
Quantum electronics
Gravitational wave detection
Maser
Laser
Notable awards Guggenheim Fellowship (1955, 1962)
National Research Council Fellowship (1955)
Scientific Achievement Award from the Washington Academy of Sciences (1958)
Babson Award of the Gravity Research Foundation (1959)
Fulbright Scholarship (1963)
Sigma Xi (1970)
Boris Pregel Prize of the New York Academy of Sciences (1973)
Maryland engineering hall of fame (1988)

Joseph Weber (May 17, 1919 – September 30, 2000) was an American physicist. He gave the earliest public lecture on the principles behind the laser and the maser and developed the first gravitational wave detectors (Weber bars).

Early education

Weber was born in Paterson, New Jersey[2] and attended Paterson public schools (and the Paterson Talmud Torah),[3] graduating from the "Mechanic Arts Course" of Paterson Eastside High School in June 1935,[4] just after his sixteenth birthday. He began his undergraduate education at Cooper Union, but to save his family the expense of his room and board he won admittance to the United States Naval Academy through a competitive exam. He graduated from the Academy in 1940.[5]

Naval career

He served aboard US Navy ships during WWII, rising to the rank of Lieutenant Commander. A memorable experience was his service on the "Lady Lex" USS Lexington (CV-2). Weber was the Officer of the Deck on the Lexington when the ship received word of the attack on Pearl Harbor. In the Battle of the Coral Sea his carrier sank the Japanese aircraft carrier Shōhō and was in turn mortally damaged on May 8, 1942. Weber often regaled his students with the story of how the Lexington glowed incandescent as she slipped beneath the waves.

Later, he commanded the sub-chaser SC-690, first in the Caribbean, and later in the Mediterranean Sea. In that role, he took part in the invasion of Sicily at Gela Beach, in July, 1943.[5]

He studied electronics at the Naval Postgraduate School in 1943-45, and from 1945–1948, he headed electronic countermeasures design for the Navy's Bureau of Ships, in Washington, DC.[5] He resigned from the Navy as a Lieutenant Commander in 1948 to become a professor of engineering.

Early post-naval career; development of the MASER

In 1948, he joined the engineering faculty of the University of Maryland, College Park. A condition of his appointment was that he should quickly attain a PhD. Thus, he did his PhD studies, on microwave spectroscopy, at night, while already a faculty member. He completed his PhD, with a thesis entitled Microwave Technique in Chemical Kinetics, from The Catholic University of America in 1951. Building on his Naval expertise in tube microwave engineering,[6] during the course of his doctoral research he worked out the idea of coherent microwave emissions. He submitted a paper in 1951 for the June 1952 Electron Tube Research Conference held in Ottawa,[7] which was the earliest public lecture on the principles behind the laser and the maser. After this presentation, RCA asked Weber to give a seminar on this idea, and Charles Hard Townes asked him for a copy of the paper.[8] Towns was working along similar lines,[9] as were Nikolay Basov and Aleksandr Prokhorov, and these three, the first to build working prototypes of these devices, jointly received the 1964 Nobel Prize in Physics "for fundamental work in the field of quantum electronics, which has led to the construction of oscillators and amplifiers based on the maser–laser principle."

Work on gravitational wave detection

His interest in general relativity led Weber to use a 1955–1956 sabbatical, funded by a Guggenheim Fellowship, to study gravitational radiation with John Archibald Wheeler at the Institute for Advanced Study in Princeton, NJ and the Lorentz Institute for Theoretical Physics at the University of Leiden in the Netherlands.[5] At the time, the existence of gravitational waves was not widely accepted. Weber was the first to make a real attempt to detect these waves. After he began publishing papers on the detection of gravitational waves, he moved from the Engineering department to the Physics department at Maryland.

He developed the first gravitational wave detectors (Weber bars) in the 1960s, and began publishing papers with evidence that he had detected these waves. In 1972, he sent a gravitational wave detection apparatus to the moon (the "Lunar Surface Gravimeter", part of the Apollo Lunar Surface Experiments Package) on the Apollo 17 lunar mission.[10][11]

Claims of gravitational wave detection discredited

In the 1970s, the results of these gravitational wave experiments were largely discredited, although Weber continued to argue that he had detected gravitational waves.[12] In order to test Weber's results, IBM Physicist Richard Garwin built a detector that was similar to Joseph Weber's. In six months, it detected only one pulse, which was most likely noise.[13] David Douglass, another physicist, had discovered an error in Weber's computer program that, he claimed, produced the daily gravitational wave signals that Weber claimed to have detected. Because of the error, a signal seemed to appear out of noise. Garwin aggressively confronted Weber with this information at the Fifth Cambridge Conference on Relativity at MIT in June 1974. A series of letters was then exchanged in Physics Today. Garwin asserted that Weber's model was "insane, because the universe would convert all of its energy into gravitational radiation in 50 million years or so, if one were really detecting what Joe Weber was detecting." "Weber," Garwin declared, "is just such a character that he has not said, 'No, I never did see a gravity wave.' And the National Science Foundation, unfortunately, which funded that work, is not man enough to clean the record, which they should." In 1972, Heinz Billing and colleauges at Max Planck Institute for Physics built a detector that was similar to Joseph Weber's to verify his claim but found no results.[14]

The process of how physicists and the general public came to reject Weber's claims that he had found gravitational waves is described in several books and articles, including Gravitational Wave Blues,[15] excerpted from Black Hole Blues and Other Songs from Outer Space, by Janna Levin; several articles and the books Gravity's Shadow and Gravity’s Ghost: Scientific Discovery in the 21st Century by sociologist Harry Collins; and Einstein's Unfinished Symphony by Marcia Bartusiak.

Discovery of gravitational waves by LIGO

On February 11, 2016, the LIGO Scientific Collaboration and Virgo Collaboration teams held a press conference to announce that they had directly detected gravitational waves from a pair of black holes merging, on Rosh Hashanah 2015, (Weber's yahrtzeit), using the Advanced LIGO detectors.[16][17][18] During the announcement, Weber was credited by numerous speakers as the founder of the field, including by Kip Thorne, who co-founded LIGO and also devoted much of his career to the search for gravitational waves. Later, Thorne told the Washington Post, “He really is the founding father of this field.”[19] Weber's second wife, astronomer Virginia Trimble, was seated in the front row of the audience during the LIGO press conference. In an interview with Science Magazine afterwards, she was asked if Weber really saw gravitational waves. She replied, “I don’t know. But I think if there had been two technologies going forward they would have pushed each other, as collaborators not as competitors, and it might have led to an observation sooner.”[20]

Work on Neutrino Detection

In the course of defending his work on gravitational wave detection, Weber began related work on Neutrino detection. Assuming infinite crystal stiffness, Weber calculated that it could be possible to detect neutrinos using sapphire crystals, and published experimental results on neutrino scattering with these crystals.[21] Weber also patented the idea of using vibrating crystals to generate neutrinos.[22] His experimental results contradicted previous and subsequent findings from other experiments, but Weber's neutrino theories continue to be tested.[21]

Legacy

Although his attempts to find gravitational waves with bar detectors are considered to have failed, Weber is widely regarded as the father of gravitational wave detection efforts, including LIGO, MiniGrail, and several HFGW research programs around the world. His notebooks contained ideas for laser interferometers; later such a detector was first constructed by his former student Robert Forward at Hughes Research Laboratories.

Joe Weber was the first to accept that challenge. Following our work together in Leiden, he embraced gravitational waves with religious fervor and has pursued them for the rest of his professional career. I sometimes ask myself whether I imbued in Weber too great an enthusiasm for such a monumentally difficult task. Whether, in the end, he is the first to detect gravitational waves or whether someone else, or some other group does it, hardly matters. In fact, he will deserve the credit for leading the way. No one else had the courage to look for gravitational waves until Weber showed that it was within the realm of the possible.
— John Archibald Wheeler, "Geons, Black Holes, and Quantum Foam: A Life in Physics,"[23] pp. 257-258.

The Joseph Weber Award for Astronomical Instrumentation was named in his honor.

Personal life

Joseph Weber was born in Paterson, New Jersey, on 17 May 1919, the last of four children born to Yiddish-speaking immigrant parents. His name was "Yonah" until he entered grammar school.[3] He had no birth certificate, and his father had taken the last name of "Weber" to match an available passport in order to emigrate to the US. Thus, Joe Weber had little proof of either his family or his given name, which gave him some trouble in obtaining a passport at the height of the red scare.

His first marriage, to his high school classmate Anita Straus, ended with her death in 1971. His second marriage was to astronomer Virginia Trimble.[5] He had 4 sons (from his first marriage), and six grandchildren.

Joseph Weber died on 30 September 2000 in Pittsburgh, Pennsylvania, during treatment for lymphoma that had been diagnosed about three years earlier.[3]

References

  1. ↑ USNA Cemetery Documentation Project: Cemetery Inventory Form. Retrieved on 2016-04-29.
  2. ↑ Staff. A COMMUNITY OF SCHOLARS: The Institute for Advanced Study Faculty and Members 1930-1980, p. 429. Institute for Advanced Study, 1980. Accessed November 22, 2015. "Weber, Joseph 55f, 62-63, 69-70 M(NS), Physics Born 1919 Paterson, NJ."
  3. 1 2 3 "Joseph Weber (1919 - 2000)". aas.org. Retrieved 2016-02-15.
  4. ↑ Annual Report of the Board of Education of Paterson, New Jersey, page 94
  5. 1 2 3 4 5 U. S. Naval Academy Class of 1940 Archive. Retrieved on 2015-02-24.
  6. ↑ American Institute of Physics Oral History Interview with Joseph Weber in 1983
  7. ↑ Innovation Hall of Fame
  8. ↑ Bertolotti, Mario (2015), Masers and Lasers, Second Edition: An Historical Approach, CRC Press, pp. 89–91, ISBN 9781482217803, retrieved March 15, 2016
  9. ↑ Charles H. Townes – Nobel Lecture
  10. ↑ Lunar Surface Gravimeter
  11. ↑ Giganti, J. J. et al. (1973). "Lunar surface gravimeter experiment" (PDF). Apollo 17 Prelim. Sci. Rept. SP-330.
  12. ↑ Early days in the Sociology of Gravitational Waves
  13. ↑ Marcia Bartusiak, Einstein's unfinished symphony, Joseph Henry Press, 2000, p. 102
  14. ↑ "Computer and gravitational wave astronomy pioneer Heinz Billing celebrates his 100th birthday". Benjamin Knispel. GEO600.org. 7 April 2014. Retrieved 22 February 2016.
  15. ↑ "How Joe Weber’s gravity ripples turned out to be all noise – Janna Levin | Aeon Essays". Aeon. Retrieved 2016-04-11.
  16. ↑ Castelvecchi, Davide; Witze, Witze (February 11, 2016). "Einstein's gravitational waves found at last". Nature News. doi:10.1038/nature.2016.19361. Retrieved 2016-02-11.
  17. ↑ B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration) (2016). "Observation of Gravitational Waves from a Binary Black Hole Merger". Physical Review Letters 116 (6). doi:10.1103/PhysRevLett.116.061102.
  18. ↑ "Gravitational waves detected 100 years after Einstein's prediction | NSF - National Science Foundation". www.nsf.gov. Retrieved 2016-02-11.
  19. ↑ "LIGO’s success was built on many failures". www.washingtonpost.com. Retrieved 2016-02-15.
  20. ↑ "Remembering Joseph Weber, the controversial pioneer of gravitational waves". www.sciencemag.org. Retrieved 2016-02-15.
  21. 1 2 "Gravity Waves and Neutrinos: The Later Work of Joseph Weber" (PDF). Retrieved 2016-02-24.
  22. ↑ "From tyres to neutrinos". Retrieved 2016-02-24.
  23. ↑ Wheeler, John Archibald; Ford, Kenneth (1998). Geons, Black Holes, and Quantum Foam: A Life in Physics. New York: W.W. Norton & Co. ISBN 0-393-04642-7.

External links

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