Celestre - SR_LNLS Bachelor Thesis

Embed Size (px)

DESCRIPTION

Optical characteristics, i.e. photon flux, brightness, brilliance , coherence, polarization, etc., as well as spatial and angular dimensions from the photon beam are parameters of great importance regarding raytracing simulations as they determine the quality of the X -ray source for photon experiments. Accurate computation of such parameters are of paramount importance for X-ray beamline projects from the new light source Sirius, Campinas, Brazil, where energy spread effects show great influence on the photon beam, being able to cause discrepancies between observed and simulated results.The observation and systematic study of the energy spread effect on photon beams are quite recent, given that it is relevant only in low emittance (high brilliance) sources or at free el ectron lasers (FEL’s) facilities [1]. Aiming to address correctly to this effect at undulator insertion devices, a computer code that handles finite emittance effects and energy spread was written in MATLAB in order to aid the calculation of optical characteristics, spatial and angular profiles of the photon beam. Comparisons between the results from the proposed code and already-stablished-codes that handle the energy spread effect were held for benchmarking. The computer codes used are SPECTRA10 and SRW.SR_LNLS was written in MATLAB and could be implemented in Python to provide input parameters to be used by the ray-tracing program SHADOW.

Text of Celestre - SR_LNLS Bachelor Thesis

  • TRABALHO DE FIM DE CURSO EA006

    SR_LNLS: UM CDIGO PARA COMPUTAO DE PARMETROS DE DISPOSITIVOS DE INSERO COM APLICAES S SIMULAES DE

    RAY-TRACING PARA LINHAS DE LUZ DE RAIOS-X DUROS.

    ALUNO:

    RAFAEL RABELLO DE LIMA DE ALMEIDA CELESTRE , RA 082568 RAFAEL.CELESTRE@LNLS.BR

    ORIENTADOR:

    PROF. DR. EDUARDO GRANADO MONTEIRO DA SILVA EGRANADO@IFI.UNICAMP.BR

    COORIENTADOR:

    ENG. BERND CHRISTIAN MEYER BERND.MEYER@LNLS.BR

    FACULDADE DE ENGENHARIA ELTRICA E DE COMPUTAO, UNIVERSIDADE ESTADUAL DE CAMPINAS

    GRUPO DE PTICA, LABORATRIO NACIONAL DE LUZ SNCROTRON, CENTRO NACIONAL DE PESQUISAS EM ENERGIA E MATERIAIS DEPARTAMENTO DE ELETRNICA QUNTICA, INSTITUTO DE FSICA GLEB WATAGHIN, UNIVERSIDADE ESTADUAL DE CAMPINAS

    CAMPINAS, 15 DE DEZEMBRO DE 2014

  • O LNLS integra o CNPEM, Organizao Social qualificada pelo Ministrio da Cincia, Tecnologia e Inovao (MCTI) Campus: Rua Giuseppe Mximo Scolfaro, 10.000 - Polo II de Alta Tecnologia

    Caixa Postal 6192 - 13083-970 - Campinas/SP - Fone: +55.19.3512.1010 | Fax: +55.19.3512.1004 | www.lnls.br

    - 2 -

  • O LNLS integra o CNPEM, Organizao Social qualificada pelo Ministrio da Cincia, Tecnologia e Inovao (MCTI) Campus: Rua Giuseppe Mximo Scolfaro, 10.000 - Polo II de Alta Tecnologia

    Caixa Postal 6192 - 13083-970 - Campinas/SP - Fone: +55.19.3512.1010 | Fax: +55.19.3512.1004 | www.lnls.br

    - 3 -

    ALUNO:

    ________________________________________________________________________________________________

    RAFAEL RABELLO DE LIMA DE ALMEIDA CELESTRE , RA 082568 RAFAEL.CELESTRE@LNLS.BR

    ORIENTADOR:

    ________________________________________________________________________________________________

    PROF. DR. EDUARDO GRANADO MONTEIRO DA SILVA EGRANADO@IFI.UNICAMP.BR

    COORIENTADOR:

    ________________________________________________________________________________________________

    ENG. BERND CHRISTIAN MEYER BERND.MEYER@LNLS.BR

    FACULDADE DE ENGENHARIA ELTRICA E DE COMPUTAO, UNIVERSIDADE ESTADUAL DE CAMPINAS

    GRUPO DE PTICA, LABORATRIO NACIONAL DE LUZ SNCROTRON, CENTRO NACIONAL DE PESQUISAS EM ENERGIA E MATERIAIS DEPARTAMENTO DE ELETRNICA QUNTICA, INSTITUTO DE FSICA GLEB WATAGHIN, UNIVERSIDADE ESTADUAL DE CAMPINAS

  • O LNLS integra o CNPEM, Organizao Social qualificada pelo Ministrio da Cincia, Tecnologia e Inovao (MCTI) Campus: Rua Giuseppe Mximo Scolfaro, 10.000 - Polo II de Alta Tecnologia

    Caixa Postal 6192 - 13083-970 - Campinas/SP - Fone: +55.19.3512.1010 | Fax: +55.19.3512.1004 | www.lnls.br

    - 4 -

    SUMRIO

    ABSTRACT .................................................................................................................................................. 6

    RESUMO ..................................................................................................................................................... 7

    OBJETIVO ................................................................................................................................................... 8

    INTRODUO .............................................................................................................................................. 9

    1. CARACTERSTICAS DA RADIAO SNCROTRON ............................................................................ 11

    1.1. RADIAO SNCROTRON ......................................................................................................... 11

    1.2. PARMETROS DO FEIXE DE ELTRONS .................................................................................. 13

    1.3. PARMETROS DO FEIXE DE FTONS ...................................................................................... 16

    2. ONDULADORES ................................................................................................................................ 20

    2.1. CARACTERSTICAS DO FEIXE DE FTONS ............................................................................... 20

    2.2. PROPRIEDADES DA RADIAO EMITIDA POR ONDULADORES PLANARES ............................. 25

    2.3. ONDULADORES NO PLANARES E DISPOSITIVOS NO CONVENCIONAIS .............................. 32

    3. MTODOS COMPUTACIONAIS ......................................................................................................... 38

    3.1. RAY TRACING ........................................................................................................................... 38

    3.2. CDIGOS PARA CERTIFICAO ............................................................................................... 39

    4. RESULTADOS ................................................................................................................................... 41

    4.1. APRESENTAO DO CDIGO SR_LNLS ................................................................................ 41

    4.2. PARMETROS DE SIMULAO ................................................................................................. 45

    4.3. RESULTADOS OBTIDOS COM O CDIGO SR_LNLS ............................................................... 47

    4.4. VALIDAO E CERTIFICAO DOS RESULTADOS ................................................................... 53

    5. MTODOS EXPERIMENTAIS PARA VALIDAO DOS RESULTADOS ................................................. 67

    5.1. MEDIDAS DA DISTRIBUIO ESPACIAL DO FLUXO DE FTONS .............................................. 67

    5.2. MEDIDAS DE EMITNCIA DO FEIXE DE FTONS ...................................................................... 68

    5.3. MEDIDAS DE COERNCIA DO FEIXE DE FTONS..................................................................... 69

    5.4. CARACTERIZAO DA POLARIZAO DO FEIXE DE FTONS .................................................. 69

    6. DISCUSSO DOS RESULTADOS ....................................................................................................... 70

    AGRADECIMENTOS .................................................................................................................................. 74

    REFERNCIAS BIBLIOGRFICAS .............................................................................................................. 75

    A. APNDICE: ASPECTOS ACERCA DA DISTRIBUIO GAUSSIANA .................................................... 80

    B. APNDICE: EQUAO DE MOVIMENTO NO ONDULADOR ................................................................ 82

    C. APNDICE: EQUAO DO ONDULADOR .......................................................................................... 84

  • O LNLS integra o CNPEM, Organizao Social qualificada pelo Ministrio da Cincia, Tecnologia e Inovao (MCTI) Campus: Rua Giuseppe Mximo Scolfaro, 10.000 - Polo II de Alta Tecnologia

    Caixa Postal 6192 - 13083-970 - Campinas/SP - Fone: +55.19.3512.1010 | Fax: +55.19.3512.1004 | www.lnls.br

    - 5 -

    D. APNDICE: SISTEMA PTICO DE MAGNIFICAO : ................................................................... 86

    E. APNDICE: TABELAS DE COMPARAO DOS RESULTADOS .......................................................... 87

  • O LNLS integra o CNPEM, Organizao Social qualificada pelo Ministrio da Cincia, Tecnologia e Inovao (MCTI) Campus: Rua Giuseppe Mximo Scolfaro, 10.000 - Polo II de Alta Tecnologia

    Caixa Postal 6192 - 13083-970 - Campinas/SP - Fone: +55.19.3512.1010 | Fax: +55.19.3512.1004 | www.lnls.br

    - 6 -

    ABSTRACT

    Optical characteristics, i.e. photon flux, brightness, brilliance1, coherence, polarization, etc.,

    as well as spatial and angular dimensions from the photon beam are parameters of great

    importance regarding ray-tracing simulations as they determine the quality of the X-ray source

    for photon experiments. Accurate computation of such parameters are of paramount

    importance for X-ray beamline projects from the new light source Sirius, Campinas, Brazil,

    where energy spread effects show great influence on the photon beam, being able to cause

    discrepancies between observed and simulated results.

    The observation and systematic study of the energy spread effect on photon beams are

    quite recent, given that it is relevant only in low emittance (high brilliance) sources or at free

    electron lasers (FELs) facilities. Aiming to address correctly to this effect at undulator insertion

    devices, a computer code that handles finite emittance effects and energy spread was

    proposed in order to aid the calculation of optical characteristics, spatial and angular profiles of

    the photon beam. Comparisons between the proposed code and already-stablished-codes that

    handle the energy spread effect were held for benchmarking.

    1 There is little agreement when it comes to defining what should be called brightness and what should be called brilliance. For a better insight, refer to (TALMAN, 2006).

  • O LNLS integra o CNPEM, Organizao Social qualificada pelo Ministrio da Cincia, Tecnologia e Inovao (MCTI) Campus: Rua Giuseppe Mximo Scolfaro, 10.000 - Polo II de Alta Tecnologia

    Caixa Postal 6192 - 13083-970 - Campinas/SP - Fone: +55.19.3512.1010 | Fax: +55.19.3512.1004 | www.lnls.br

    - 7 -

    RESUMO

    As caractersticas pticas, isto , fluxo de ftons, brilho, brilhncia2, coerncia, polarizao,

    etc., bem como os perfis espaciais e angulares do feixe de ftons, so parmetros

    importantes s simulaes de ray-tracing3 e determinam a qualidade da fonte de raios-X para

    experimentos. A computao correta de tais caractersticas essencial para projetos de

    linhas de luz