Atomic and Molecular Data Activities at NIFS in

Transcription

1 21 th DCN meeting, IAEA, Sep. 7-9, 2011 Atomic and Molecular Data Activities at NIFS in Izumi Murakami Atomic and Molecular Processes Section, Fusion Systems Research Division, Department of Helical Plasma Research, National Institute for Fusion Science, Oroshi-cho 22-6, Toki, Gifu , Japan

2 Outline 1. NIFS database 2. Satellite databases. Research activities related to AM data 4. NIFS-DATA publications 5. Summary

3 1. NIFS database Retrievable numerical database for collision processes Recent changes New server started since Mar (without support from company) No SSL access (since Sep. 2010) Data update mainly for AMDIS (e-impact excitation & recombination) and CHART (charge exchange)

4 AM and PWI Numerical Database ( DB Name Contents Period Records (Aug. 2, 2011) AMDIS EXC ION DIO Electron impact excitation of atoms Electron impact ionization of atoms Electron impact dissociation of simple molecules REC Electron recombination of atoms CHART Charge exchange of ion-atom collision AMDIS MOL (AMOL) CHART MOL (CMOL) Electron collision with molecules Heavy particle collision with molecules 46,592 (408,164 (Aug. 2009)) 7,054 (5,05) ,765 SPUTY Sputtering yield of solid ,241 BACKS Reflection coefficient of solid surface ORNL (AM Bibliographic database) Bibliography on atomic collisions collected at ORNL, USA ,714

5 Change of number of data recodes in the database Number of Data in the Database AMDIS CHART MOL SPUTY BACKS ORNL Number of Data as of Aug. 2, 2011 AMDIS 46,592 * CHART 7,054 * MOL,765 SPUTY 1,241 BACKS 96 ORNL 77,714 User interface revise of AMDIS REC (2007-8) NO registration (2007) User interface revise of AMDIS EXC (2006) Rate coefficients in AMDIS (200) IAEA GENIE (2002) MOL (2001) Data Update Working Group (2000-) AMDIS Recombination (1998) WWW (1997)

6 counts Access counts to the database (query counts) query counts AMDIS CHART SPUTY BACKS MOL FY1998 FY1999 FY2000 FY2001 FY2002 FY200 FY2004 FY2005 FY2006 FY2007 FY2008 FY2009 FY AMDIS RECombination (1999) Data update working group (2000 -) MOL (2001) GENIE (2001) Rate coefficients (200) No registration (2007) User interface revise AMDIS EXC (2006) User interface revise AMDIS REC (2007-8)

7 FY2000 FY2001 FY2002 FY200 FY2004 FY2005 FY2006 FY2007 FY2008 FY2009 FY2010 Access count to AMDIS (ION/EXC/REC) Search count for AMDIS GENIE/AMDIS AMDIS AMDIS GENIE/AMDIS 20~27% of queries are via GENIE

8 Examples of new data Ni 10+ excitation cross sections CHART Charge transfer cross section Ar H(1s) Ar 14+ (n,l) + H + AMDIS EXC E-impact excitation

9 2. Satellite databases Small databases are linked at the database top page, such as rate coefficients of electron dissociative attachment to molecular hydrogen. Database of Photoabsorption cross sections are available (since 2010).

10 Preparing a new database of bibliography and cross sections for atoms and molecules Bibliography and cross section data compilation and evaluation for 67 atoms and molecules were done by Prof. M. Hayashi (passed away in 2005) Bibliographic data on publications in 20 th century for 17 atoms and molecules were published as NIFS-DATA series in NIFS-DATA-72 (Ar), NIFS-DATA-74 (CO 2 ), NIFS-DATA-76 (SF 6 ), NIFS-DATA-77 (N 2 ), NIFS-DATA-79 (Xe), NIFS-DATA-80 (F 2, Cl 2, Br 2, I 2 ), NIFS-DATA-81 (water vapour), NIFS-DATA-82 (H 2 ), NIFS-DATA-8 (HF, HCl, HBr, HI), NIFS-DATA-87 (NH, PH ), NIFS-DATA-90 (CH 4 ) CH4 (from NIFS-DATA-90)

11 A new database for data compiled by Prof. Hayashi Graphs of cross section data for 6 atoms and molecules were published in Handbook for Plasma Material Science (in Japanese in 1992) Cross section data sets for 4 molecules (Cd, NO, CCl 2 F 2, CCl 4 ) are not published yet. Many bibliographic data are not published yet. => Opened as a new database from NIFS in near future Set of cross sections for CH 4 taken from Handbook for Plasma Material Science

12 . Research activities related to AM data < A new collaboration group has started for research on atomic and molecular processes using LHD since > < A new project on W has started since Apr with atomic physicists and plasma physicists in Japan.> EUV and visible spectra of Tungsten ions measured with Tokyo-EBIT, CoBIT, and LHD Atomic structure calculations for Tungsten ions CR model for Tungsten ions Sputtering experiments for Tungsten target EUV spectra of Ga and Nd ions measured with LHD EUV spectra of Fe ions measured with LHD and EBIT/CoBIT

13 .1 Tungsten spectra taken with LHD plasmas EUV spectra measurements in Large Helical Device (LHD) plasmas with W TESPEL (Tracer Encapsulated Solid PELlet) or C + W pellet injected. VUV spectrometer SOXMOS is used for EUV measurements for 4-8nm and 15-27nm. (Suzuki et al.) Visible spectra are also measured. (Goto et al.) LHD plasmas : T e ~1-4keV (core), (typically) n e ~1-6x10 1 cm - (core)

14 LHD & VUV spectrometer 1.5 m TESPEL (pellet) injector Plasma.6 m Large Helical Device Type Grooves Wavelength Detector Resolution Spectrometer "SOXMOS" Schwob-Fraenkel 2 m grazing incidence spectrometer 1.6 or 600 grooves/mm 1 5 nm 2 MCPs + Phosphor + Photodiode Array ~ 0.01 nm

15 Spectral lines of tungsten ions observed in LHD Suzuki (NIFS) et al. Neutral tungsten in visible (by M. Goto) Cu- and Zn- like in 6 nm region Ag- Pd- and Rh-like in 5 nm region W 28+ W 27+ W 44+ W 29+ W 45+ near tungsten plate with tungsten pellet T e ~ kev with tungsten pellet T e ~ 1 kev W 0+ W 4+ (open 4p/4d subshell) W 7+ W 26+ (open 4f/5s/5p subshell) Away from the closed shell Complex energy level structure Quasi-continuum UTA (unresolved transition array) feature

16 Quasicontinuum feature in the 20 nm region Suzuki et al. J. Phys. B 44 (2011) LHD ASDEX-U Pütterich et al., Plasma Phys. Control. Fusion 50, (2008). Quasicontinuum feature with a peak near 18 nm was observed in LHD, similar to that in ASDEX Upgrade tokamak. Emissivity in longer wavelength side (22 26 nm) is more pronounced in LHD.

17 5s 5p transitions (W 12+ W 26+ ) Cowan s code calculations (4f n +) 4f n-2 5s 2 4f n-2 5s5p (CI) 4f n-1 5s 4f n-1 5p Suzuki et al. (2011) spin-orbit splitting

18 UTA statistics of n = 5 5 transitions for W 7+ W 27+ Suzuki et al. (2011) 5p-5d 5s-5p n = 5 5 transitions between excited states with CI The mean wavelength and the standard deviation are obtained from the noncentered moments μ 1 and μ 2 in terms of wavelength. Only the subarrays in shorter wavelengths are included in the statistics for W 12+ W 27+.

19 .2 EUV and Visible W Spectra measured with CoBIT (compact EBIT) Sakaue (NIFS), Nakamura (Univ. Electro-communication) et al. Electron beam energy = 100eV ~ 2keV => measured for W 11+ (225eV) ~ W 4+ (1440eV)

20 Peak wavelength shift 5f-4d Sakaue et al. APiP (2011) 5g-4f 6g-4f Peak wavelengths calculated with a CR model with atomic data calculated by the HULLAC code in configuration mode (configuration averaged energy and total angular momentum J for energy levels) agree with the measurements.

21 . Collisional-Radiative model Murakami et al. We have constructed collisional-radiative (CR) models for W 24+ ~ W 0+ ions with atomic data calculated by HULLAC code. W 24+ ~ W 27+ : (ground) 4p 6 4d 10 4f n (n=4,,2,1), (excited) 4p 6 4d 10 4f n-1 5l, 4p 6 4d 10 4f n-1 6l, 4p 6 4d 9 4f n+1 W 28+ ~ W 0+ : (ground) 4p 6 4d n (n=10,9,8), (excited) 4p 6 4d n-1 4f, 4p 6 4d n-1 5l Ne= cm - and Electron mono energy = 800ev and 1200ev. Rate equations for population densities of excited states n(p) are solved with quasi-steady state assumption. (Recombination processes are ignored) dn( p) in out 0 dt in out q p C ( q, p) n n( q) { F( q, p) n A( q, p)} n( q) [ S( p) n e e q p q p Electron-impact excitation De-excitation C( p, q) n Electron-impact ionization e q p e F( p, q) n e Radiadive decay A( p, q)] n( p)

22 .4 Atomic structure calculations with GRASP code (Multi-Configuration Dirac- Fock calculations) Ding (NIFS), Koike (Kitasato Univ.), et al. M1 visible transitions among the ground state for W 26+ : [Kr]4f 2 = 4s 2 4p 2 4d 10 4f 2 Ding et al. J. Phys. B 44 (2011) [4f -2 ] 4 - [[4f - ] 5/2 [4f] 7/2 ] 5 884A (MCDF) 894A (exp) M1 transitions for Ag-like ions Z=47-92 : [Kr] 4f W 27+ : 4d 10 4f 2 F 5/2 2 F 7/2 : 410.9A (MCDF) Ding et al., in preparation

23 Convergence feature in the wavelength of W 26+ H 5 - H 4 M1 transitions Ding et al. (2011) 96 With VV and CV correlations 884 With VV, CV, and CC correlations transition: [4f- 2 ] 4 - [[4f-] 5/2 [4f] 7/2 ] 5

24 Possible visible transitions between the W 26+ ground state multiplets Tran Wavelength(Å) Type A ij (s -1 ) gf H 5 H M1.94(2) 9.80(-6) 1 S Ding et al. (2011) E2 1.69(-) 4.21(-11) H 6 H M1 2.05(2) 8.75(-6) E2.1(-4) 1.41(-11) 1 I 6 F M1 2.90(-2) 1.26(-9) P F 4 H E2 6.6(-4) 2.00(-11) F F M1 1.75(2) 4.62(-6) E2 7.28(-5) 1.92(-12) P 6851 P D F I 1 G 4 F M1 1.82(-4) 6.7(-12) 4826 H P 2 P M1 6.4(1) 1.28(-6) F 1 G 4677 E2 6.65(-4) 1.(-11) F 2 H M1 7.(-) 1.58(-10) P 1 1 D M1 2.(1) 4.9(-7) F H H E2 9.59(-6) 2.0(-1)

25 .5 Sputtering experiment for W target Motohashi (Toyo Univ.), Sakai (Toho Univ.), Sakaue (NIFS), Kato (NIFS) et al. Purpose: to estimate velocity of sputtered W atoms in order to get information how fast sputtered W atoms go into a plasma. Experiments: Ion beam irradiates W target and we measure visible emission lines emitted from excited W atoms which are sputtered from W target.

26 E V P (probability) V Solid h Z Excited atom 1-P (non-radiative transition probability) Spectrometer I 0 I Intensity dumping I I 0 exp z v Doppler Broadening I v v 0 c 0 c 2 0 z λ λ 0

27 Experimental set up Ion beam : He q+, Ne q+, Ar q+, Kr q+, H q+, C q+ ions (q=1~2) Injection energy : several kev~100kev

28 Preliminary Results Kr + (kev) - W(Poly) SISS-1 (2011/6/2 Toyota, Japan) Table.1. Identified lines of the optical emission spectra. Label Species Transitions A WI 5d 5 ( 6 S)6p, 7 P 4 5d 5 ( 6 S)6s, 7 S B WI 5d 5 ( 6 S)6p, 7 P 5d 5 ( 6 S)6s, 7 S C WI 5d 5 ( 6 S)6p, 7 P 2 5d 5 ( 6 S)6s, 7 S D WI 5d 4 6s ( 6 D)6p, 7 D 4 5d 5 ( 6 S)6s, 7 S E WI 5d 4 6s ( 6 D)6p, 7 D 2 5d 4 6s 2, 5 D 1 F WI 5d 4 6s ( 6 D)6p, 7 D 1 5d 4 6s 2, 5 D 1 G WI 5d 4 6s ( 6 D)6p, 7 D 1 5d 4 6s 2, 5 D 0 H WI 5d 4 6s ( 6 D)6p, 7 F 1 5d 4 6s 2, 5 D 0 I WI 5d 4 6s ( 6 D)6p, 7 D 5d 4 6s 2, 5 D J WI 5d 4 6s ( 6 D)6p, 7 D 2 5d 4 6s 2, 5 D 2 K WI 5d 4 6s ( 6 D)6p, 7 D 1 5d 4 6s 2, 5 D 2 L WI 5d 4 6s ( 6 D)6p, 7 D 2 5d 4 6s 2, 5 D M KrII 4s 2 4p 4 ( P)5p, 4 D 7/2 4s 2 4p 4 ( P)5s, 4 P 5/2 Typical Kr + -induced photon emission spectrum. N KrII 4s 2 4p 4 ( P)5p, 4 P 5/2 4s 2 4p 4 ( P)5s, 4 P 5/2 2011/6/2 SIMS 1 in Nagoya

29 4. NIFS-DATA publications ( ) NIFS-DATA-112 V.P. Shevelko, D. Kato, M.S. Litsarev and H. Tawara The Energy-deposition Model: Electron Loss of Heavy Ions in Collisions with Neutral Atoms at Low and Intermediate Energies (Sep. 0, 2010) NIFS-DATA-111 A.D. Ulantsev and I. Murakami Transitions between Fine-structure Levels of FeXX Ion in Collisions with Protons in High-temperature Plasmas (July 27, 2010) NIFS-DATA-110 K.M. Aggarwal, T. Kato, F.P. Keenan and I. Murakami Energy Levels, Radiative Rates and Electron Impact Excitation Rates for Transitions in He-like C V (July 1, 2010) NIFS-DATA-109 N. Sakamoto, H. Tsuchida, T. Kato, S. Kamakura, H. Ogawa, K. Ishii, I. Murakami, D. Kato, H. Sakaue, M. Kato, J. Berkowitz, M. Inokuti Oscillator Strength Spectra and Related Quantities of 9 Atoms and 2 Molecules Over the Entire Energy Region (Apr. 8, 2010) NIFS-DATA-108 H. Kato, H. Kawahara, M. Hoshino, M.C. Garcia, S.J. Buckman, M.J. Brunger, L. Campbell, H. Cho, Y.- K. Kim, J.-S. Yoon, M.-Y. Song, D. Kato, I. Murakami, T. Kato and H. Tanaka Cross Sections and Oscillator Strengths for Electron-impact Excitation of Electronic States in Polyatomic Molecules -Application Examples of the BEf- scaling model in Optically-allowed Transitions- (Dec. 14, 2009) NIFS-DATA-107.V.P. Shevelko, D. Kato, M-.Y. Song, H. Tawara, I.Yu. Tolstikhina and J-.S. Yoon One-electron Capture and Target Ionization in He+-neutral-atom Collisions (Dec. 11, 2009)

30 5. Summary A&M database activities: - we keep going, but lack of man-power. - New system might be necessary to be considered. A & M data related activities: - a collaboration group is organized and a (moderately) big project has started on W. - a collaboration group has started for experiments using LHD. We are required to advertise LHD as a plasma source for A&M research.