Search for Solar Axions: CAST Biljana Lakić IRB Zagreb, TU Darmstadt for the CAST collaboration 2004 LHC DAYS IN SPLIT, 5 – 9 October 2004 LHC DAYS IN.

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Presentation transcript:

Search for Solar Axions: CAST Biljana Lakić IRB Zagreb, TU Darmstadt for the CAST collaboration 2004 LHC DAYS IN SPLIT, 5 – 9 October 2004 LHC DAYS IN SPLIT, 5 – 9 October

Biljana Lakić 2004 LHC DAYS IN SPLIT Outline: Axions Axions The CAST experiment: The CAST experiment: Physics behind the experiment Physics behind the experiment Description: Description: Magnet, tracking Magnet, tracking X-ray telescope and X-ray detectors X-ray telescope and X-ray detectors Analysis and preliminary results Analysis and preliminary results Prospects Prospects

Biljana Lakić 2004 LHC DAYS IN SPLIT Axions The strong CP problem: (QCD vacuum + EW quark mixing) Peccei-Quinn solution: -new global chiral U(1) PQ symmetry spontaneously broken at scale f a -associated pseudo Nambu-Goldstone boson: axion ! -axion mass: Axion: pseudoscalar, neutral, practically stable -direct contribution to the electric dipole moment of the neutron d n -strong experimental bound on d n requires  absorbed in the definition of a

Biljana Lakić 2004 LHC DAYS IN SPLIT Axions Axion models: Standard axion model (f a  f weak ) excluded experimentaly Standard axion model (f a  f weak ) excluded experimentaly Invisible axion models (f a >>f weak, g  1/f a, m a ~1/f a ) Invisible axion models (f a >>f weak, g  1/f a, m a ~1/f a ) KSVZ (Kim, Shifman, Vainshtein, Zakharov) KSVZ (Kim, Shifman, Vainshtein, Zakharov) DFSZ (Dine, Fischler, Srednicki, Zhitnitskii) DFSZ (Dine, Fischler, Srednicki, Zhitnitskii) -axion-photon coupling via triangle loop -axion-pion mixing Axion-photon coupling:

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Physics a thermal photon converts into an axion in the Coulomb fields of nuclei and electrons in the solar plasma (Primakoff process) an axion converts into a photon in a strong transverse magnetic field an axion converts into a photon in a strong transverse magnetic fieldSun:Earth: -expected number of photons S = detector effective area t = measurement time t = measurement time

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Physics - differential axion flux at the Earth: K. van Bibber et al.,1989

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Physics -conversion probability in the gas (in vacuum:  = 0, m  =0): L=magnet length,  =absorption coeff. axion-photon momentum transfer effective photon mass (T=1.8 K) -coherence condition:

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Physics Predicted exclusion plot 1 year with vacuum in the magnet bores: m < 2.3  eV (during 2003 and 2004) 1 year with vacuum in the magnet bores: m < 2.3  eV (during 2003 and 2004) 1 year with 4 He gas pressure increased from mbar in 100 increments: m < 0.26 eV 1 year with 4 He gas pressure increased from mbar in 100 increments: m < 0.26 eV 1 year with 3 He gas pressure increased from mbar in 365 increments : m < 0.83 eV1 year with 3 He gas pressure increased from mbar in 365 increments : m < 0.83 eV To start in 2005

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Collaboration Canada, Vancouver, Bc University of British Columbia Department of Physics (1 participant(s)) Team Leader: Michael HASINOFF Michael HASINOFF Croatia, Zagreb Ruder Boskovic Institute (3 participant(s)) Team Leader: Milica KRCMAR Milica KRCMAR, Biljana LAKIC, Ante LJUBICIC France, Gif-Sur-Yvette Centre d'Etudes de Saclay (CEA-Saclay) DAPNIA (6 participant(s)) Team Leader: Ioanis GIOMATARIS Samuel ANDRIAMONJE, Alain DELBART, Esther FERRER RIBAS, Ioanis GIOMATARIS, Emile PASQUETTO, Jean Pierre ROBERT Germany, Darmstadt Technische Universitat Darmstadt Institut für Kernphysik (6 participant(s)) Team Leader: Konstantin ZIOUTAS Horst BALONIER, Theopisti DAFNI, Dieter HOFFMANN, Joachim JACOBY, Manfred MUTTERER, Hans RIEGE Germany, Frankfurt Am Main Johann-Wolfgang-Goethe Universität Frankfurt Institut für Kernphysik Team Leader: Konstantin ZIOUTAS Germany, Freiburg Albert-Ludwigs-Universität Freiburg (6 participant(s)) Team Leader: Kay KONIGSMANN Horst FISCHER, Jurgen FRANZ, Igor GARCIA IRASTORZA, Fritz-Herbert HEINSIUS, Donghwa KANG, Kay KONIGSMANN Germany, Garching Max-Planck-Gesellschaft (MPG) Max-Planck-Institut für Extraterrestrische Physik (2 participant(s)) Team Leader: Markus KUSTER Heinrich BRAEUNINGER, Markus KUSTER Germany, Muenchen Max-Planck-Institut fόr Physik (3 participant(s)) Team Leader: Gerhard LUTZ Rainer KOTTHAUS, Gerhard LUTZ, Georg RAFFELT Greece, Athens National Center for Scientific Research "Demokritos" (NRCPS) (4 participant(s)) Team Leader: George FANOURAKIS George FANOURAKIS, Theodoros GERALIS, Konstantinos KOUSOURIS, Aikaterini ZACHARIADOU Canada, Vancouver, Bc, University of British Columbia Department of Physics (1 participant(s)) Team Leader: Michael HASINOFF Michael HASINOFF Department of Physics Croatia, Zagreb Ruder Boskovic Institute (3 participant(s)) Team Leader: Milica KRCMAR Milica KRCMAR, Biljana LAKIC, Ante LJUBICIC Ruder Boskovic Institute France, Gif-Sur-Yvette, Centre d'Etudes de Saclay (CEA-Saclay) DAPNIA (6 participant(s)) Team Leader: Ioanis GIOMATARIS Samuel ANDRIAMONJE, Alain DELBART, Esther FERRER RIBAS, Ioanis GIOMATARIS, Emile PASQUETTO, Jean Pierre ROBERT DAPNIA Germany, Darmstadt, Technische Universitat Darmstadt Institut für Kernphysik (6 participant(s)) Team Leader: Konstantin ZIOUTAS Horst BALONIER, Theopisti DAFNI, Dieter HOFFMANN, Joachim JACOBY, Manfred MUTTERER, Hans RIEGE Institut für Kernphysik Germany, Frankfurt Am Main, Johann-Wolfgang-Goethe Universität Frankfurt Institut für Kernphysik Team Leader: Konstantin ZIOUTAS Institut für Kernphysik Germany, Freiburg Albert-Ludwigs-Universität Freiburg (6 participant(s)) Team Leader: Kay KONIGSMANN Horst FISCHER, Jurgen FRANZ, Igor GARCIA IRASTORZA, Fritz-Herbert HEINSIUS, Donghwa KANG, Kay KONIGSMANN Albert-Ludwigs-Universität Freiburg Germany, Garching, Max-Planck-Gesellschaft (MPG) Max-Planck-Institut für Extraterrestrische Physik (2 participant(s)) Team Leader: Markus KUSTER Heinrich BRAEUNINGER, Markus KUSTER Max-Planck-Institut für Extraterrestrische Physik Germany, Muenchen Max-Planck-Institut fόr Physik (3 participant(s)) Team Leader: Gerhard LUTZ Rainer KOTTHAUS, Gerhard LUTZ, Georg RAFFELT Max-Planck-Institut fόr Physik Greece, Athens National Center for Scientific Research "Demokritos" (NRCPS) (4 participant(s)) Team Leader: George FANOURAKIS George FANOURAKIS, Theodoros GERALIS, Konstantinos KOUSOURIS, Aikaterini ZACHARIADOU National Center for Scientific Research "Demokritos" (NRCPS) Greece, Thessaloniki Aristotle University of Thessaloníki (6 participant(s)) Team Leader: Christos ELEFTHERIADIS Spyridon DEDOUSIS, Christos ELEFTHERIADIS, Anastasios LIOLIOS, Argyrios NIKOLAIDIS, Ilias SAVVIDIS, Konstantin ZIOUTAS Aristotle University of Thessaloníki Italy, Pisa Scuola Normale Superiore (SNS)Scuola Normale Superiore (SNS) (1 participant(s)) Team Leader: Luigi DI LELLA Luigi DI LELLA Russia, Moskva, Russian Academy of Sciences Institute for Nuclear Research (INR) (3 participant(s)) Team Leader: Sergei GNINENKO Alexandre BELOV, Sergei GNINENKO, Nikolai GOLUBEV Institute for Nuclear Research (INR) Spain, Zaragoza, Universidad de Zaragoza Facultad de Ciencias Instituto de Física Nuclear y Altas Energías (7 participant(s)) Team Leader: Angel MORALES Berta BELTRAN LIZARRAGA, Jose CARMONA MARTINEZ, Gloria LUZON MARCO, Julio MORALES, Jaime RUZ ARMENDARIZ, Maria SARSA, Jose VILLAR Instituto de Física Nuclear y Altas Energías Switzerland, Geneve European Organization for Nuclear Research (CERN) (12 participant(s)) Team Leader: Martyn DAVENPORT Klaus BARTH, Gino CIPOLLA, Martyn DAVENPORT, Rui DE OLIVEIRA, Fabio FORMENTI, Jean-Noel JOUX, Christian LASSEUR, Angelika LIPPITSCH, Thomas PAPAEVANGELOU, Alfredo PLACCI, Bruno VULLIERME, Louis WALCKIERS European Organization for Nuclear Research (CERN) United States of America, Chicago Il, University of Chicago Enrico Fermi Institute (3 participant(s)) Team Leader: Juan COLLAR Juan COLLAR, David MILLER, Joaquin VIEIRA Enrico Fermi Institute United States of America, Columbia Sc, University of South Carolina Department of Physics and Astronomy (2 participant(s)) Team Leader: Frank AVIGNONE Richard CRESWICK, Horacio FARACH Department of Physics and Astronomy The total number of participants: 65

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: CERN Axion Solar Telescope Decomissioned LCH test magnet Rotating platform 3 X-ray detectors X-ray Focusing Device Decomissioned LCH test magnet Rotating platform 3 X-ray detectors X-ray Focusing Device

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Magnet, tracking L= 9.26 m B=9 T  100 times better than any other !! CAST Experimental area SR8

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Magnet, tracking Motors Encoders E. Readout  computer Software with astronomical calculations Interface to move magnet New angle encoders Calibrated and correlated with celestial coordinates  high precision geometer measurements (precision 0.01  ) Snapshot of the tracking program

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Magnet, tracking March 2003 September 2003 Twice a year (September and March) we can film the Sun through the window

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Telescope, detectors   X-Ray Telescope (Focusing Device)   Detectors   CCD   Micromegas   TPC

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: X-ray telescope 27 concentrically nested mirror shells: - focal length 1.6 m - diameter 164 mm Space technology: prototype for the satellite ABRIXAS X-ray telescope with the CCD in place

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: X-ray telescope   from 43 mm ∅ (LHC magnet aperture) to ~3 mm ∅   signal-to-noise improvement (up to 200!!!) 43 mm  1.6 m 3 mm  ~35% efficiency due to reflections

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: CCD Geometry: 200  64 pixels (1  3 cm 2 ) Pixel size: 150  150  m 2 CCD temperature: -130  C excellent space resolution pn-CCD chip cooling mask Shield: low activity copper and lead

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: CCD Efficiency (1-7 keV): > 95 %  constrained only by telescope FWHM: keV  excellent energy resolution 55 Fe 5.9 keV lines K,L Background spectrum ~ counts keV -1 s -1 cm -2 (Cu and Au lines from the cooling mask)

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Micromegas 192 charge collection strips for x 192 charge collection strips for y Micromegas in place Gas: Ar 95%, Isobutane 5% CAST prototype

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Micromegas Background rate: counts s -1 cm -2 keV keV X-ray Spectrum

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: TPC Geometry: 30 cm  15 cm  10 cm Gas: Ar 95%, CH 4 5% Position sensitive (3 mm spacing) Position sensitive (3 mm spacing) 48 anode wires (x) 48 anode wires (x) 96 cathode wires (y) 96 cathode wires (y)

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: TPC Integrated spectrum from 1-10 keV: 9.3×10 -5 cts/keV/s/cm 2 3.8×10 -5 cts/keV/s/cm 2 There is an improvement by a factor of 2.4!! E (keV) 55 Fe Calibration spectrum Clean materials + shielding (polyethylene + copper + ancient lead )

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Analysis 2003 CCD TPC Micromegas -no signal observed so far

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Analysis 2003 g a  (95% C.L.) < 1.2  GeV -1  Combined upper limit (preliminary !)

Biljana Lakić 2004 LHC DAYS IN SPLIT CAST: Prospects Canada, Vancouver, Bc University of British Columbia Department of Physics (1 participant(s)) Team Leader: Michael HASINOFF Michael HASINOFF Croatia, Zagreb Ruder Boskovic Institute (3 participant(s)) Team Leader: Milica KRCMAR Milica KRCMAR, Biljana LAKIC, Ante LJUBICIC France, Gif-Sur-Yvette Centre d'Etudes de Saclay (CEA-Saclay) DAPNIA (6 participant(s)) Team Leader: Ioanis GIOMATARIS Samuel ANDRIAMONJE, Alain DELBART, Esther FERRER RIBAS, Ioanis GIOMATARIS, Emile PASQUETTO, Jean Pierre ROBERT Germany, Darmstadt Technische Universitat Darmstadt Institut für Kernphysik (6 participant(s)) Team Leader: Konstantin ZIOUTAS Horst BALONIER, Theopisti DAFNI, Dieter HOFFMANN, Joachim JACOBY, Manfred MUTTERER, Hans RIEGE Germany, Frankfurt Am Main Johann-Wolfgang-Goethe Universität Frankfurt Institut für Kernphysik Team Leader: Konstantin ZIOUTAS Germany, Freiburg Albert-Ludwigs-Universität Freiburg (6 participant(s)) Team Leader: Kay KONIGSMANN Horst FISCHER, Jurgen FRANZ, Igor GARCIA IRASTORZA, Fritz-Herbert HEINSIUS, Donghwa KANG, Kay KONIGSMANN Germany, Garching Max-Planck-Gesellschaft (MPG) Max-Planck-Institut für Extraterrestrische Physik (2 participant(s)) Team Leader: Markus KUSTER Heinrich BRAEUNINGER, Markus KUSTER Germany, Muenchen Max-Planck-Institut fόr Physik (3 participant(s)) Team Leader: Gerhard LUTZ Rainer KOTTHAUS, Gerhard LUTZ, Georg RAFFELT Greece, Athens National Center for Scientific Research "Demokritos" (NRCPS) (4 participant(s)) Team Leader: George FANOURAKIS George FANOURAKIS, Theodoros GERALIS, Konstantinos KOUSOURIS, Aikaterini ZACHARIADOU Greece, Thessaloniki Aristotle University of Thessaloníki (6 participant(s)) Team Leader: Christos ELEFTHERIADIS Spyridon DEDOUSIS, Christos ELEFTHERIADIS, Anastasios LIOLIOS, Argyrios NIKOLAIDIS, Ilias SAVVIDIS, Konstantin ZIOUTAS Italy, Pisa Scuola Normale Superiore (SNS) (1 participant(s)) Team Leader: Luigi DI LELLA Luigi DI LELLA Russia, Moskva Russian Academy of Sciences Institute for Nuclear Research (INR) (3 participant(s)) Team Leader: Sergei GNINENKO Alexandre BELOV, Sergei GNINENKO, Nikolai GOLUBEV Spain, Zaragoza Universidad de Zaragoza Facultad de Ciencias Instituto de Física Nuclear y Altas Energías (7 participant(s)) Team Leader: Angel MORALES Berta BELTRAN LIZARRAGA, Jose CARMONA MARTINEZ, Gloria LUZON MARCO, Julio MORALES, Jaime RUZ ARMENDARIZ, Maria SARSA, Jose VILLAR Switzerland, Geneve European Organization for Nuclear Research (CERN) (12 participant(s)) Team Leader: Martyn DAVENPORT Klaus BARTH, Gino CIPOLLA, Martyn DAVENPORT, Rui DE OLIVEIRA, Fabio FORMENTI, Jean-Noel JOUX, Christian LASSEUR, Angelika LIPPITSCH, Thomas PAPAEVANGELOU, Alfredo PLACCI, Bruno VULLIERME, Louis WALCKIERS United States of America, Chicago, Il University of Chicago Enrico Fermi Institute (3 participant(s)) Team Leader: Juan COLLAR Juan COLLAR, David MILLER, Joaquin VIEIRA United States of America, Columbia, Sc University of South Carolina Department of Physics and Astronomy (2 participant(s)) Team Leader: Frank AVIGNONE Richard CRESWICK, Horacio FARACH Vacuum in the magnet bores: 2003 & 2004 Vacuum in the magnet bores: 2003 & 2004 PHASE 2: 4 He & 3 He in the magnet bores  to start in 2005 ! PHASE 2: 4 He & 3 He in the magnet bores  to start in 2005 ! …. and also … High energy axions: High energy calorimeter installed during 2004 High energy axions: High energy calorimeter installed during 2004 Axion astronomy Axion astronomy 14.4 keV solar nuclear axion line 14.4 keV solar nuclear axion line Kaluza-Klein axions Kaluza-Klein axions