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Princess Sirindhorn Neutron Monitor project

Introduction in English

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We are taking data! [Photos][Data]

ѡ˵ؼ

ç ԴʶҹյǨѴǵ͹Թ Թ

             ͧ¾ҡسҸԤسͧ稾෾ѵҪش Ҫ ô ҪҹҪҹحҵʶҹյǨѴǵ͹觹չ ʶҹյǨѴǵ͹Թ (Princess Sirindhorn Neutron Monitor)”

ѧ ͸ԺѡâͧʶҹյǨѴǵ͹ ˵ؼ㹡õ駷Թ

ͧǨѴǵ͹աþѲҢ繤á㹻 .. ѹ  (J. A. Simpson)  ԷªԤ  Ѱԡ    ֡ǡѺѧդԡվѧҹ٧ (дѺ GeV) Ǥ ͹Ҥѧҹ٧Ҩҡǡ (¸ҵ)  ͧǨѴǵ͹ʶҾ٧աõ駷˹觵ҧ š »ªҡʹš㹡äѴ͡͹ҤдѺѧҹҧ ѹ  աúاѡ§硹 ͧѴẺöŷդس٧㹷ҧԷʵԹ˹觷 з觶֧ҷ· ʶҹշ Ѱԡ

㹡õʶҹյǨѴӹǹǵ͹ҡͧ мԨµͧ˹ѡҹǵ͹ҹԴҡêҧѧդԡѺҡš  ѧʶҹյǨѴǵ͹ѧѴѡͧѧդԡǡȹͧ

㹺dzͧҡ躹ٹٵâͧʹš  硢Ǥ (magnetic dipole) ͧš (çѺٹҧͧš) Դҷҧ¾ʹ ѧ ͧǨѴǵ͹٧㹻¨öѴѧդԡվѧҹ٧ 繪ǧѧҹѧաõǨѴԨҡ͹  ҹ֧դӤѭ㹧ҹԨ·ҧԷʵҧҡ 

͡ҡŷʹԧԡʵ鹰ҹ ʶҹյǨѴǵ͹ѧŷǢͧѺҹҹäҤФ蹤ͧ Шӹǹ͹Ҥѧդԡǡա¹ŧͧҡ ˵кԷöҹҧǤдҨҧ ҡҢŷҡʶҹյǨѴǵ͹öӹ͹Ҿǡȷռšзšǧ˹

٧ͧ˹觷еԴʶҹյǨѴǵ͹դӤѭҡ ͧҡ͹Ҥǵ͹ըӹǹŴŧẺ͡๹ ͤѹҡդ ء駷٧Ŵŧ ӹǹǵ͹ѴŴŧ 繵 ͶºѺʹԹ (, ) ͤ٧Ŵŧ֧дѺ , ٭¢Ŷ֧ 繵 ѧ鹺dzʹԹ֧繺dzҧ㹡õԴʶҹյǨѴǵ͹Թ

ͧҡºͧ˹觷Թ ŧóԷѺúԨҤػóǨѴǵ͹ҡԷªԹ (Shinshu University) ȭ ѺʹѺʹعҡͧ US National Science Foundation ҹҧʶҺѹԨº Է Ѱԡ 㹴ҹâػóҡѧ ͡ҡҧͧԷ ԷªԹ Է ʹҹйѺõԴʶҹյǨѴǵ͹Թ ѧѺʹѺʹع㹴ҹͧʴФѳҡԷغҪҹӹѡҹͧعʹѺʹعԨ (ʡ.)

͡ҡ ǤмԨ·кԡԪҡҾǡ (space weather) ¶֧šзͧ蹡ᷡͧҡûзطǧҷԵյ͡Ԩͧ   äҤ (šзҧҾǡ·ѧ֧ӹǹ ǧ) çԵ俿 Ф蹤ͧ 繵 ¤мԨԹշ˹ҷҹҹҧԪҡáѺ˹§ҹҧ Ǣͧ㹻

                Neutron monitors, first developed by the late J. A. Simpson at the University of Chicago in about 1948, are the best way to study GeV-energy cosmic rays (e.g., energetic particles from space) as a function of time.  These are very stable detectors set up in various locations around the world, to take advantage of the Earth’s magnetic field as an energy-selective magnetic spectrometer.  With only minimal maintenance, such a detector can provide valuable scientific information for decades. 

    Thailand (along with Burma and eastern India) is in a unique location, at the Earth’s magnetic equator and close to the offset dipole center.  Therefore, a neutron monitor at high altitude in Thailand would provide new, unique, and important scientific information about high-energy cosmic rays.  [Note that a “neutron” monitor measures secondary neutrons cased by the collisions of primary cosmic ray ions into the Earth’s atmosphere, so they really measure the cosmic ray ion flux.]

    In addition to basic astrophysical interest, time variations in the cosmic ray count rate are closely related to solar storms that can disable satellites and radio communications near Earth.  Neutron monitor data can help give advanced warning of such “space weather” effects at Earth, as explained in previous research in Thailand [Ruffolo, D. 1999, Astrophysical Journal, 515, 787; Leerungnavarat, K., Ruffolo, D., and Bieber, J. W. 2003, Astrophysical Journal, 593, 587].

   A high altitude is very important – the counting rate, and hence the scientific benefits, decrease exponentially with increasing atmospheric pressure (i.e., atmospheric overburden).  Therefore, a location near the summit of Doi Inthanon (Thailand's highest mountain) is highly desirable.

For more information on neutron monitors, visit the Bartol Research Institute Neutron Monitor Program

See also their English language summary of the Princess Monitor.

Ӫᨧ [ҡõͺӶǡѺ õԴʶҹյǨѴǵ͹Թ ҡ reviewers ͧͧعʹѺʹعԨ (ʡ.)] ŧóԷ

    . ͵ԴʶҹյǨѴǵ͹ԹºǨöҧѡԨҧҹ?

㹤繨ԧ §ҧʶҹյǨѴǵ͹ԹõԴºҹ 㹡õԴ   ѧѺ͡Ӥѭ㹡þѲҹѡԨ ੾Ѻѡ֡Ҩ㹡мԨ 觻Ѩغѹպҷ㹡ŨҡʶҹյǨѴǵ͹ͧҧ 觨㨶֧Ѩ·ռšз͡Ѵѧդԡ õԴʶҹյǨѴǵ͹Թ ٹѡзҧ÷ͧѺѡԡǡ㹻 觡͹˹ҹ§ҹɮЧҹͧ¤ҹ  ѧ֧繼ŷյͻ·շ駡Ԩ㹷ҧɮСԨ㹡繢ͧͧ 觤мԨӡþѲҨö觢ѹǷš СþѲҤö㹡üԵŢͧͧ

ͧҡмԨѺػó§ҧǹ ҷ ѧҴкǹ աҡ ûżŢ ŤԧԷʵ кûż Ҩԧ з觡Ҹóк͢Թ ʴҤмԨѧէҹͧաҡ ѧͧùѡԷʵ ҧ෤Ԥҹҧ ѹѲҷػó ЧҹҧҹԷʵµç

ѧ çùպҷ㹡þѲҹѡ֡йѡԷʵ繨ӹǹҡ 㹴ҹ෤ԤѴ͹Ҥ (particle detection) пԡǡ ŧҹ»շҹҢͧмԨ (çõҧ ʹѺʹع·عͧҡ ʡ.) ¤мԨѴѡԨǹ㹧ҹԨ Ъ¾Ѳҹѡ֡Ҩӹǹҡ㹷ء ç

ǹͧͧҧЧҹʶҹյԴǹ 繡ѡ֡ǹ㹡 ҡʶҹյǨѴǵ͹褳мԨ·ӷءѹ ªҢͧ㹵ҧŴԸաѲҢ㹻 ͡ҡʶҹյǨѴǵ͹Թ÷Թ͡ѡɳçѴ͹Ҥվѧҹ٧ҷѴš (Ѿ෤Ԥդ vertical cutoff rigidity . ԡŵ ͹ҤԴõ͹ͧԹ . ԡŵ˹˹¤ʧ ֧Ъҡ˹ͻмԵǵ͹Ѵš) ѧ ҴҤŧҹվдѺҹҪҵ¡ ѧʶҹյԴ

 

   . 红Ẻҧ NASA ѺͧҨЪ·Ţͧó?

ҡ͸Ժ㹵͹ (֧Թ·ҧѹ͡) 繷š͹Ҥͧվѧҹҡش֧Ҫҡš ͧҡ ʶҹյǨѴǵ͹ʶҹ ʹš㹡áͧ͹Ҥ (͹ magnetic spectrometer) ТŷҡʶҹյǨѴǵ͹Ѻ˹觷駺šҧҡ ÷ӧҹͧѡԡʵŨҡʶҹ§˹ʶҹյҧ Сͺѹ͢ 觡ʶҹմԹЪѺŷóҡ ѧʶҹš͹ѺѴԹ ѧ鹡õʶҹչ繡͢ʶҹյǨѴǵ͹šó觢

Ѱ ͧعͧ National Science Foundation (NSF) ػóѴҤ鹴Թ ǹ National Aeronautics and Space Administration (NASA) ʹѺʹعѴ͹Ҥǡ  Ѵ NSF ʹѺʹعçâͧмԨºҧ ʹѺʹعâػóҡȭ ⡴ѧ͢зͧ¡ Թҳ , Ѱ (ҡ , ҷ)

 

    . ŷ纹͡ʹ? ö͢ŷͶͨҡҧ

ͧҡŷӡѺŨҡҧ ѧ͸Ժ¢ҧ

͡¤ʹ㹢ŴԺҡʶҹյǨѴǵ͹Թµç Ҩʹ㨼ѾҧþҡóҾǡ (space weather)  ԧ ҹҧҹɮ㹡мԨҧҢŨҡʶҹյǨѴǵ͹ö͹ǧ˹Ҥ蹡ᷡСзš ҷ͹ǧ˹ - 㹢зºѺ NASA 繻ШӨ͹ǧ˹ (¡Ѵµçҹǡ ACE)

ǹþѲҼԵѳ㹷ҧäҨҡŷҡʶҹյǨѴǵ͹Ҥ͡Ҩʹ㨹 ͧաç˹觵ҧҡ (ǹç÷ʹ çԨԧԪҡ 觡鹡þѲͧ) ʡ. ͡ҧмԨµʹ ҹԨԧءû֡͡Ѻ͹ Ҩ繷ͧâͧ ѡԨèԹҡͧҤ͡Ҩʹ ǾѲҼԵѳ֡ҡѺ

ѧ еͧա÷Ӥ㨡Ѻ ֧ӤѭͧҾǡлªͧѧդԡ

            ԧ ͧ÷Ҩʹ㨢ŨҡԹҡ Ҩ繡ͧѾҡͧ͡Ѿ мšзҡҾǡդӤѭҡ͡âͧͧԹ Ѱ ͧѾҡСͧѾͷӧҹԨҡҧҹ ͧѾҨʹէҹԨТŨҡ㹻 ͧ蹤ͧҵ

 

      . Ǻҹª? ҡռŵ͡ôçԵ

÷´÷ȹ UBC 繻ШӨзҺ ҧ UBC лС Ҩзѭҳ㹡¡÷ȹҶ֧ҹ ¶֧šзҧҾǡȹͧ (ԧҧ UBC 㨼Դ ǹ˭öҡóǧ˹ѻẺ) ͡ҡ¡÷ȹ ա

ѭҳѺͶ ԷصԴ GPS еʺó㹵ҧ к俿觾Ѳҡ դ§͡˹ǹӷԴͧҡҾǡ Ҩŧѧ 繵 ҡ觢

ػ ͻȾѲҡ觢 ԶժԵͧЪҪ觵ͧ觾෤ժ٧ ͡ʷѺšзҡҾǡҡ觢 ЧҹԨ·㹡þҡóŴѧЪͧҾǡ ֧繻ªͻЪҪӹǹҡ

㹻ȷѲ ѧҧԷʵ ЪҪǹ˭зҺͧǡͧ 駹෤ǡպҷͧѧͧ㹪ԵШѹ 㹴ҹ֡ҡաͧ෤ǡȷдѺ֡Ѹ֡ҵʹ 觷ЪҪ˹ѡ֧Ӥѭͧ෤ǡ зҧмԨԹͧҾǡ

 

ٻ¢ͧ觵͹ùͧʶҹյǨѴǵ͹Թѧ Էʵ ŧóԷ С֡Ҵ٧ҹʶҹյǨѴǵ͹ University of Tasmania

Photos of the arrival of equipment for the Princess Sirindhon Neutron Monitor, in shipping containers, at Chulalongkorn University, and our trip to study neutron monitor physics at the University of Tasmania in Australia.

 

ٻ¡÷ͺ͹ (MicroMonitor)

Photos of a test setup at Chulalongkorn University: the MicroMonitor (one tube, no lead, no polyethylene reflector)

 

ٻ¡âµ͹ùҡԷʵ ŧóԷ ͢ѧ˹§ҹ  ͨͧ  ѧѴ§ ѹҷԵ 18 Ҿѹ 2550 

Photoes of moving containers from Faculty of Science, Chulalongkorn University to Phupisit Chomthong Chieangmai on February 18, 2007

 

ٻ¡ԹҧѧʶҹյǨѴǵ͹Թ Թ ѧѴ§ ҧѹ 24 Ҿѹ 2550  ֧ 1 չҤ 2550

Photos of installation of 43 tons of lead and polyethylene during February 24 - March 1, 2007

 

ٻ More photos [click ʹٻҾ]  

(Data)  [click ʹ٢]

 

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