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October 07, 2009 02:47 AM
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-----quote----
In 1995, the CERN laboratory in Geneva first produced antihydrogen in the LEAR by shooting antiprotons, which were produced in a particle accelerator, at xenon clusters. When an antiproton gets close to a xenon nucleus, an electron-positron-pair can be produced, and with some probability the positron will be captured by the antiproton to form antihydrogen. The probability for producing antihydrogen from one antiproton was only about 10-19, so this method is not well suited for the production of substantial amounts of antihydrogen, 1 as detailed calculations had shown before 2.
-----quote----
information quoted from http://en.wikipedia.org/wiki/Antihydrogen
Here is the link to the page which will show you how the CERN created Antihydrogen
http://www.aip.org/pnu/2002/split/605-1.html
http://www.interactions.org/cms/?pid=1000630
this link also gives a detail explanation and also pictures
http://www.elsevierscitech.com/emails/physics/First-production-and-detection-of-cold-antihydrogen-atoms.pdf
Source(s):
http://www.aip.org/pnu/2002/split/605-1.html
http://www.interactions.org/cms/?pid=1000630
http://www.elsevierscitech.com/emails/physics/First-production-and-detectio...
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--quote--
Positrons from a sodium radioactive source and antiprotons were brought together in a magnetic Penning trap, where synthesis took place at a typical rate of 100 antihydrogen atoms per second. Antihydrogen was first produced by these two collaborations in 2002, and by 2004 perhaps a hundred thousand antihydrogen atoms were produced in this way.
The antihydrogen atoms synthesized so far have had a very high temperature (a few thousand kelvins), thus hitting the walls of the experimental apparatus as a consequence and annihilate. A potential solution to this problem would be to produce antihydrogen atoms at such a low temperature (perhaps a fraction of a kelvin) that they can be captured in a magnetic trap or a combined rf trap.
--/quote--
http://en.wikipedia.org/wiki/Antihydrogen#Production
--quote--
Antimatter can be used to sensitively test the theoretical underpinnings of the Standard Model. Essential to the quantum field theory governing interactions of fundamental particles is the so-called CPT theorem, which involves discrete symmetries. The CPT theorem requires that the laws of physics be invariant under the following operation: all particles are replaced by their antiparticle counterparts (Charge conjugation), all spatial coordinates are reflected about the origin (Parity), and the flow of time is reversed (Time reversal). The CPT theorem has important implications for antimatter, including the above-mentioned mass equivalence of particle and antiparticle.
--/quote--
http://athena-positrons.web.cern.ch/ATHENA-positrons/wwwathena/hbar.html
http://athena-positrons.web.cern.ch/ATHENA-positrons/wwwathena/graphics/WEP.jpg
Take a look at the sources for more detailed information.
Source(s):
http://en.wikipedia.org/wiki/Antihydrogen
http://hussle.harvard.edu/~atrap/
http://athena.web.cern.ch/athena/
http://www.aip.org/pnu/2002/split/605-1.html
http://74.125.153.132/search?q=cache:DEGV0Ib-UUsJ:athena-positrons.web.cern...
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How was Antihydrogen created by CERN?
What was the significance in discovering Antihydrogen?
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| October 07, 2009 03:16 AM |
In 1995, the CERN laboratory in Geneva first produced antihydrogen in the LEAR by shooting antiprotons, which were produced in a particle accelerator, at xenon clusters. When an antiproton gets close to a xenon nucleus, an electron-positron-pair can be produced, and with some probability the positron will be captured by the antiproton to form antihydrogen. The probability for producing antihydrogen from one antiproton was only about 10-19, so this method is not well suited for the production of substantial amounts of antihydrogen, 1 as detailed calculations had shown before 2.
-----quote----
information quoted from http://en.wikipedia.org/wiki/Antihydrogen
Here is the link to the page which will show you how the CERN created Antihydrogen
http://www.aip.org/pnu/2002/split/605-1.html
http://www.interactions.org/cms/?pid=1000630
this link also gives a detail explanation and also pictures
http://www.elsevierscitech.com/emails/physics/First-production-and-detection-of-cold-antihydrogen-atoms.pdf
Source(s):
http://www.aip.org/pnu/2002/split/605-1.html
http://www.interactions.org/cms/?pid=1000630
http://www.elsevierscitech.com/emails/physics/First-production-and-detectio...
| Asker's Rating: |
• Explain the how the two traps are used to capture anti-hydrogen
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Other Answers (1)
October 07, 2009 03:36 AM
Antihydrogen is produced at CERN by experiments carried out by the ATRAP and ATHENA collaborations. --quote--
Positrons from a sodium radioactive source and antiprotons were brought together in a magnetic Penning trap, where synthesis took place at a typical rate of 100 antihydrogen atoms per second. Antihydrogen was first produced by these two collaborations in 2002, and by 2004 perhaps a hundred thousand antihydrogen atoms were produced in this way.
The antihydrogen atoms synthesized so far have had a very high temperature (a few thousand kelvins), thus hitting the walls of the experimental apparatus as a consequence and annihilate. A potential solution to this problem would be to produce antihydrogen atoms at such a low temperature (perhaps a fraction of a kelvin) that they can be captured in a magnetic trap or a combined rf trap.
--/quote--
http://en.wikipedia.org/wiki/Antihydrogen#Production
--quote--
Antimatter can be used to sensitively test the theoretical underpinnings of the Standard Model. Essential to the quantum field theory governing interactions of fundamental particles is the so-called CPT theorem, which involves discrete symmetries. The CPT theorem requires that the laws of physics be invariant under the following operation: all particles are replaced by their antiparticle counterparts (Charge conjugation), all spatial coordinates are reflected about the origin (Parity), and the flow of time is reversed (Time reversal). The CPT theorem has important implications for antimatter, including the above-mentioned mass equivalence of particle and antiparticle.
--/quote--
http://athena-positrons.web.cern.ch/ATHENA-positrons/wwwathena/hbar.html
Take a look at the sources for more detailed information.
Source(s):
http://en.wikipedia.org/wiki/Antihydrogen
http://hussle.harvard.edu/~atrap/
http://athena.web.cern.ch/athena/
http://www.aip.org/pnu/2002/split/605-1.html
http://74.125.153.132/search?q=cache:DEGV0Ib-UUsJ:athena-positrons.web.cern...
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http://www.interactions.org/cms/?pid=1000630