A proposed muon facility at RAON/Korea

Size: px

Start display at page:

Download "A proposed muon facility at RAON/Korea"

Cecilia Snow
5 years ago
Views:

1 A proposed muon facility at RAON/Korea 1

2 A proposed muon facility at RAON/Korea Eunil Won Korea University International Symposium on Science Explored by Ultra Slow Muon, Aug. 9-12,

3 Contents A new accelerator under construction in Korea A proposal on a muon facility Ongoing work for a μsr facility design R&D for a charged lepton flavor violation experiment 2

4 RISP or RAON RISP: Rare Isotope Science Project (RISP) of Institute for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, RAON for rare isotope science researches in Korea 3

5 RISP or RAON RISP: Rare Isotope Science Project (RISP) of Institute for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, RAON for rare isotope science researches in Korea RAON: - pure Korean word meaning Delightful, Joyful, Happy 3

6 RISP or RAON RISP: Rare Isotope Science Project (RISP) of Institute for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, RAON for rare isotope science researches in Korea RAON: - pure Korean word meaning Delightful, Joyful, Happy with a wish that this accelerator would be a delightful gift for scientists all over the world and for the bright future of mankind. 3

7 RISP or RAON RISP: Rare Isotope Science Project (RISP) of Institute for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, RAON for rare isotope science researches in Korea RAON: - pure Korean word meaning Delightful, Joyful, Happy with a wish that this accelerator would be a delightful gift for scientists all over the world and for the bright future of mankind. KoRIA: Korea Rare Isotope Accelerator 3

8 RISP or RAON RISP: Rare Isotope Science Project (RISP) of Institute for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, RAON for rare isotope science researches in Korea RAON: - pure Korean word meaning Delightful, Joyful, Happy with a wish that this accelerator would be a delightful gift for scientists all over the world and for the bright future of mankind. KoRIA: Korea Rare Isotope Accelerator 3

9 RISP or RAON RISP: Rare Isotope Science Project (RISP) of Institute for Basic Science (IBS) is a part of ISBB program to build a heavy ion accelerator, RAON for rare isotope science researches in Korea RAON: - pure Korean word meaning Delightful, Joyful, Happy with a wish that this accelerator would be a delightful gift for scientists all over the world and for the bright future of mankind. KoRIA: Korea Rare Isotope Accelerator 3

10 A Brief History of RISP 4

11 A Brief History of RISP ISBB plan (2009.1) Preliminary Design Study ( ) Conceptual Design study ( ) International Advisory Committee (2011.7) Institute for Basic Science(IBS) established ( ) Rare Isotope Science Project (RISP) launched ( ) 1 st RISP Workshop on Accelerator Systems (2012.5) 1 st Technical Advisory Committee (2012.5) Baseline Design Summary (2012.6) International Advisory Committee (2012.7) KoPAS (Particle Accelerator School) ( ) 2 nd RISP Workshop on Accelerator Systems (2013.5) 2 nd TAC (2013.5) Technical Design Report (2013, summer) 4

12 A Brief History of RISP ISBB plan (2009.1) Preliminary Design Study ( ) Conceptual Design study ( ) International Advisory Committee (2011.7) Institute for Basic Science(IBS) established ( ) Rare Isotope Science Project (RISP) launched ( ) 1 st RISP Workshop on Accelerator Systems (2012.5) 1 st Technical Advisory Committee (2012.5) Baseline Design Summary (2012.6) International Advisory Committee (2012.7) KoPAS (Particle Accelerator School) ( ) 2 nd RISP Workshop on Accelerator Systems (2013.5) 2 nd TAC (2013.5) Available from Technical Design Report (2013, summer) 4

13 RISP 5

14 History of Elements Discovery 6 Source: B. Sherrill (Mathematica+Wikipedia)

15 History of Elements Discovery rise of modern chemistry Cooper Age India Babylonia Egypt China Democritus - Ideas of Atoms 6 Source: B. Sherrill (Mathematica+Wikipedia)

16 History of Elements Discovery Chemistry, Dalton s atomic theory Cavendish, Priestly, Scheele,... Mendeleev s Periodic Table Times of alchemist 7 Source: B. Sherrill (Mathematica+Wikipedia)

17 History of Elements Discovery Chemistry, Dalton s atomic theory Cavendish, Priestly, Scheele,... Mendeleev s Periodic Table Particle Accelerators Times of alchemist 7 Source: B. Sherrill (Mathematica+Wikipedia)

18 Origin of Elements Abundance of atoms 8

19 Origin of Elements Abundance of atoms Light elements are dominated (log scale!) 8

20 Origin of Elements Abundance of atoms Light elements are dominated (log scale!) 8

21 Origin of Elements Abundance of atoms Light elements are dominated (log scale!) 8 Where are they all from? Why is abundance so asymmetric?

22 Origin of Elements What we know so far... 9

23 Origin of Elements What we know so far... Light elements were produced by Big-Bang (Big-Bang Nucleosynthesis) 9

24 Origin of Elements What we know so far... Light elements were produced by Big-Bang (Big-Bang Nucleosynthesis) Heavy elements up to Fe were produced by nuclear fusion in Stars 9

25 Origin of Elements What we know so far... Light elements were produced by Big-Bang (Big-Bang Nucleosynthesis) Heavy elements up to Fe were produced by nuclear fusion in Stars Elements heavier than Fe were produced by consecutive capture of neutrons followed by beta decays (in violent astronomical processes such as Supernova explosion) s-process, r- process still to be understood! 9

26 Origin of Elements What we know so far... Light elements were produced by Big-Bang (Big-Bang Nucleosynthesis) Heavy elements up to Fe were produced by nuclear fusion in Stars Elements heavier than Fe were produced by consecutive capture of neutrons followed by beta decays (in violent astronomical processes such as Supernova explosion) s-process, r- process still to be understood! 9 One of main research topics at RISP

27 The Nuclear Landscape Chart of Nuclides (sometimes called a Segre Plot or Segre Chart) Green closed are is the region of isotopes observed so far Black squares are the around 260 stable isotopes found in nature (> 1 Gy) 10

28 Science/applications Nuclear Physics Exotic nuclei near the neutron drip line Superheavy Elements Equation of state of nuclear matter Nuclear structure 11

29 Science/applications Nuclear Physics Exotic nuclei near the neutron drip line Superheavy Elements Equation of state of nuclear matter Nuclear structure Material Science μsr/β-nmr Production & Characterization of new materials 11

30 Science/applications Nuclear Physics Exotic nuclei near the neutron drip line Superheavy Elements Equation of state of nuclear matter Nuclear structure Particle/Atomic physics Charged lepton flavor violation/symmetry EDM/Atomic trap Material Science μsr/β-nmr Production & Characterization of new materials 11

31 Science/applications Nuclear Physics Exotic nuclei near the neutron drip line Superheavy Elements Equation of state of nuclear matter Nuclear structure Nuclear Astrophysics Origin of nuclei Paths of nucleosynthesis Neutron stars and supernovae Particle/Atomic physics Charged lepton flavor violation/symmetry EDM/Atomic trap Material Science μsr/β-nmr Production & Characterization of new materials Nuclear data with fast neutrons Basic nuclear reaction data for future nuclear energy Nuclear waste transmutation 11 Medical and Bio sciences Advanced therapy technology Mutation of DNA New isotopes for medical imaging

Science/applications Nuclear Physics Exotic nuclei near the neutron drip line Superheavy Elements Equation of state of nuclear matter Nuclear structure Nuclear Astrophysics Origin of nuclei Paths of

32 Science/applications Nuclear Physics Exotic nuclei near the neutron drip line Superheavy Elements Equation of state of nuclear matter Nuclear structure Nuclear Astrophysics Origin of nuclei Paths of nucleosynthesis Neutron stars and supernovae Particle/Atomic physics Charged lepton flavor violation/symmetry Atomic trap Material Science μsr/β-nmr Production & Characterization of new materials Nuclear data with fast neutrons Basic nuclear reaction data for future nuclear energy Nuclear waste transmutation 12 Medical and Bio sciences Advanced therapy technology Mutation of DNA New isotopes for medical imaging

33 Production of Rare Isotope Beam ISOL(Isotope Separator On-Line) p to thick target (eg. Uranium Carbide) : target spallation or fission (low energy) RI Ions Re-acceleration RI Beam Stopping Stopped Beam experiment (Traps) RI Ion Beam Fast Beam experiment IF(In-Flight Fragmentation) Stable heavy ion beam thin target projec/le fragmenta/on (high energy) 13

unique capability of Stopping producing RI in both ways Stopped Beam experiment (Traps) RI Ion Beam

34 Production of Rare Isotope Beam ISOL(Isotope Separator On-Line) p to thick target (eg. Uranium Carbide) : target spallation or fission (low energy) RI Ions Re-acceleration RI Beam RISP has unique capability of Stopping producing RI in both ways Stopped Beam experiment (Traps) RI Ion Beam Fast Beam experiment IF(In-Flight Fragmentation) Stable heavy ion beam thin target projec/le fragmenta/on (high energy) 13

35 Worldwide Existing/Planning Isotope Accelerator B. Sherrill 14

36 RAON Site It is located to near Daejeon (~1 hour from Seoul by KTX) Daejeon We are here 15

37 RAON Site It is located to near Daejeon (~1 hour from Seoul by KTX) Daejeon We are here 15

38 RAON Site It is located to near Daejeon (~1 hour from Seoul by KTX) Daejeon We are here 15

39 Concept of RAON 16

40 Concept of RAON 16

41 KPS 2012 (YKKIM/IBS) 17

42 A proposed muon facility at RAON We are proposing a muon facility at RAON Who are we? A small group of high energy physicists who are interested in both μsr and charged lepton flavor violation experiments. 18

43 Micro-Beam structure of RAON Continuous beam (for proton, 600 MeV/660 μα): - At RISP the accelerator structure (80 MHz microstructure) and the pion lifetime (26 ns) leads to a practically continuous surface muon beam 200 ps : from private communication with E. S. 80 MHz = 125 ns - But since one has to correlate incoming muon+ and the decay positron, one muon at a time to the sample should be achieved (otherwise it is background) 19

44 Micro-Beam structure of RAON Continuous beam: - At RISP the accelerator structure (80 MHz microstructure) and the pion lifetime (26 ns) leads to a practically continuous surface muon beam - But since one has to correlate incoming muon+ and the decay positron, one muon at a time to the sample should be achieved (otherwise it is background) 20

45 Continuous vs. Pulsed Pulsed beam: - At a pulsed machine all the muons are contained in a pulse ( ns wide) with low repetition rate (25-50 Hz) : such as J-PARC facility - This allows a higher rate (all the decay positrons of a pulse are measured at once) - But only one positron in a detector or in the case of more than one, you have to get the time stamp on them 21

46 It will be extremely beneficial if we have one continuous and one pulsed μsr facilities in Asian region! 22

47 Muon RAON Muon meeting JHLee/RISP μsr facility to be located here 23

48 Muon RAON Place is secured Budget is not yet 3600 cm Muon meeting JHLee/RISP 24

49 Muon facility R&D 25

surface muons/proton ε(collection)~o(3x10-2 ) 26 ε(transport)~o(0.6-0.

50 Muon production/transport/ moderation - We are at early stage of conceptual design Muon transport (660 ua) 4x10 15 protons/s Muon production ~10-5 surface muons/proton ε(collection)~o(3x10-2 ) 26 ε(transport)~o( ) (moderation: 10-5 ) ~10 4 thermalized muons/s But don t take this number too seriously yet

51 Ultra slow muon transport R&D - Einzel lens design simulation (CST) Kyungmin Lee, Jihoon Choi/KU ByeongRok Ko/ KU Moderated muons come in - Result of simulation after field map into Geant4 (using PSI tool) : unit (mm) 27

52 Fundamental muon RAON - Some of us have been looking at a muonium oscillation experiment (but not limited to it) Phys. Rev. Lett. 82, 49 (1999) - Various new fundamental interaction can cause Mu to anti- Mu transition - Not updated since A new technique to reject accidental and irreducible backgrounds more effectively needed 28

53 Fundamental muon RAON arxiv: Charged Lepton Flavor Violation: An Experimenter s Guide - by R. Bernstein and P. Cooper (Fermilab) - excellent review of clfv experiments 29

54 Fundamental muon RAON arxiv: Charged Lepton Flavor Violation: An Experimenter s Guide - by R. Bernstein and P. Cooper (Fermilab) - excellent review of clfv experiments Latest limit: Phys. Rev. Lett. 82, 49 (1999) - typical counter type - suffer from rate-dependent background - < 3x10-3 GF was achieved 29

55 Fundamental muon RAON arxiv: Charged Lepton Flavor Violation: An Experimenter s Guide - by R. Bernstein and P. Cooper (Fermilab) - excellent review of clfv experiments Latest limit: Phys. Rev. Lett. 82, 49 (1999) - typical counter type - suffer from rate-dependent background - < 3x10-3 GF was achieved M. Aoki, NIM A 503, 258 (2003) - a radiochemical approach - antimuonium absorbed in tungsten nucleus (μ - W νμ 184 Ta) - < 10-4 GF can be possible 29

56 Fundamental muon RAON arxiv: Charged Lepton Flavor Violation: An Experimenter s Guide - by R. Bernstein and P. Cooper (Fermilab) - excellent review of clfv experiments Latest limit: Phys. Rev. Lett. 82, 49 (1999) - typical counter type - suffer from rate-dependent background - < 3x10-3 GF was achieved M. Aoki, NIM A 503, 258 (2003) - a radiochemical approach - antimuonium absorbed in tungsten nucleus (μ - W νμ 184 Ta) - < 10-4 GF can be possible arxiv: improve counter type experiment - use modern technology - could reduce limit by 10-2 (but with pulsed beam) 29

Fundamental muon physics @ RAON arxiv:1307.5787 Charged Lepton Flavor Violation: An Experimenter s Guide - by R. Bernstein and P.

57 Fundamental muon RAON arxiv: Charged Lepton Flavor Violation: An Experimenter s Guide - by R. Bernstein and P. Cooper (Fermilab) - excellent review of clfv experiments Latest limit: Phys. Rev. Lett. 82, 49 (1999) - typical counter type - suffer from rate-dependent background - < 3x10-3 GF was achieved M. Aoki, NIM A 503, 258 (2003) - a radiochemical approach - antimuonium absorbed in tungsten nucleus (μ - W νμ 184 Ta) - < 10-4 GF can be possible arxiv: improve counter type experiment - use modern technology - could reduce limit by 10-2 (but with pulsed beam) 29

58 Fundamental muon One slide R&D status RAON Geant4 study for tracker is ongoing Muonium production R&D is starting with J-PARC people Improvement from MWPC 40 MeV e- in Xenon gas (atm) 10 MeV Improvement from CsI and faster timing Active target? 8 MeV 4 MeV 30

59 Fundamental muon One slide R&D status RAON Geant4 study for tracker is ongoing Muonium production R&D is starting with J-PARC people Improvement from MWPC 40 MeV e- in Xenon gas (atm) 10 MeV Improvement from CsI and faster timing Active target? 8 MeV 4 MeV 30

60 Summary 31

61 Summary A new accelerator under construction in Korea A proposed muon facility is described Conceptual design work for a μsr facility in progress R&D for a fundamental muon physics experiment is started One pulsed in Japan and one continuous μsr facility will be complementary and extremely beneficial to all of us 31

Zach Meisel, PAN 2016

Nuclear Astrophysics Zach Meisel, PAN 2016 Nuclear Astrophysics is the study of: Energy generation in stars and stellar explosions Extremely dense matter The origin of the elements If the sun were powered