2009-07-16 05:28:06
press release #16

759 delegates from 36 countries presented 389 oral and 541 poster presentations.

The Armenian delegation included:

Chilingarian Ashot, Martirosov Romen, Grabsky Varlen (on leave from Mexican High Energy Physics Institute), Mailyan Bagrat.

12 reports were presented:

1. Chilingarian A. et al., "New Particle Detector Network for Solar Physics and Space Weather research"
2. Chilingarian A. and Mailyan B., Investigation of daily variations of cosmic ray fluxes in the beginning of the 24th solar activity cycle
3. Martirosov R. et al., "Galactic diffuse gamma ray flux at energy about 175 TeV"
4. Chilingarian A. and Bostanjyan K.,"Cosmic Ray Intensity variations detected by ASEC monitors during the 23rd solar activity cycle in correlation with Solar Transient events"
5. Chilingarian A.et al.,"Thunderstorm correlated enhancements of Cosmic Ray flux, detected at mt. Aragats"
6. Chilingarian A. et al.,"Calculation of the barometric coefficients for the particle detectors belonging to the world-wide networks at the start of the 24-th Solar Activity cycle"
7. Chilingarian A. et al.,"Median Filtering Algorithms for Multichannel Detectors"
8. Matsubara Y. et al, "Status of the world-wide network of solar neutron telescopes in solar cycle 24"
9. Butikofer R. et al., "Near real-time determination of ionization and radiation dose rates induced by cosmic rays in the Earth�s atmosphere � a NMDB application"
10. Kudela K. et al., "On mid-term periodicities in cosmic rays: utilizing the NMDB archive"
11. Mavromichalaki H. et al., "Using the real-time Neutron Monitor Database to establish an Alert signal"
12. Klein L. et al., "WWW.NMDB.EU: The real-time Neutron Monitor database"

First conference of the Fermi era: Gamma � ray observatory named after Enriko Fermi (former GLAST) started to produce copious data on the point sources of the gamma radiation in the energy range 100 MeV � 100 GeV, exploring Universe in gamma rays with unprecedented accuracy. Another hit of the conference were the explorations of regions with enhanced cosmic ray flux by Milagro, Argo and Tibet arrays. This extended regions contine Geminga and Monogem Ring Supernova Remnants, possibly in past accelerating cosmic rays. Unexpected was the absence of iron knee in KASCADE-GRANDE data. Energy spectra up to 1018 didn�t contain any noticeable structures, despite small wiggle around 1017 eV. Spectra of Solar Cosmic Rays as obtained by unfolding Ground Level Enhancement data (GLE) were reviewed by Tylka and Vashenyuk. Both agreed on 2 component model of Solar Cosmic Rays : the first prompt, asymmetric, connected with flare and CME traversal in low corona and the second, symmetric and connected with acceleration on shock waves in high corona. The GLE N 69 from 20 January 2005 has maximal SCR energy 14.1 GeV. AMMM registered this GLE, so Aragats data can enlarge maximal energy minimum till 20 GeV. GLE N 69 has maximal energy 4.61 GeV (cutoff rigidity of Jungfrauyoch) Fluence of the second component is much higher than the first one; however, the highest energies can be connected with the first component.

Good news is that the Pamela flight is postponed till 2012, giving chance to detect Energy Spectra of Solar Cosmic Rays with energies up to 10 GeV. Another shocking result of Pamela is non vanishing positron-to-electron ratio at 100 GeV = 0.1, instead of near to 0. Gang Li from UCLA report calculations on CME topology enabling acceleration and transport of solar cosmic rays. He found that colliding CME can provide structures enabling acceleration to high energies.
Fukashima in his review of Auger result rejected the previous claim of AGN- Auger particle correlations. Reported 8/13 and 9/14 correlations (8 from 13 and independently 9 from 14 ultrahigh energy cosmic rays come from AGN direction) turns with enlarged data sample to 8/31 � only 8 from 31 events with estimated energy of greater than 55 EeV come from AGN directions. The reason of it is wrong treatment of experimental data, so called, �optimization� of sigma via multiple tests and cuts in experimental parameters space. Without taking into account number of attempts to obtain great values of sigma, it is wrong to connect �optimized� sigma with chance probability of standard Gaussian distribution. Another modified distribution should be used. I pointed on this error of Auger collaboration 2 years ago and now at CRD site we put WEB calculator of chance probability using new correct function of both sigma and number of attempts. So, the problem of highest energy cosmic rays is still enigmatic; nonetheless, many evidence support SNR origin of cosmic rays up to 1018 eV.
New, promising direction of cosmic ray research was called by Morall applied Cosmic Rays including research of connections with climate change and atmospheric electricity. Arnold Wolfendale devoted his HESS lecture also to climate and lightning correlations with cosmic ray flux. He cited, (as well as rapporteur did) the recent results from Aragats on cosmic ray enhancement during thunderstorms and pioneering work on measuring energy spectra of run-away electrons. Aragats results confirm relativistic run-away model with positive feedback, most popular theory of lightning and other atmospheric phenomena.
During the conference an NMDB meeting was held with representatives from 10 countries. Next meeting will be during the Cosmic Ray school in Athens in September. Director of Mexican Geophysics Institute Garsia-Valdes suggested to put SEVAN module in the vicinity of new Mexican high energy astrophysics laboratory at altitude of 4,600 m. A.Galper suggested YerPhI to participate in the new project GAMMA-400 to measure both gamma �quanta and electron/positrons in energy range 1 � 30,000 GeV. New facility will expand possibilities of both Fermi and Pamela. Anatoly Petruchin from Russian Nuclear University invited CRD young scientists to participate in traditional school in Nalchik in October. Agreement was achieved with Karel Kudela from Slovak Akademy of Sciences to install SEVAN module in Kosice.
The 32-nd Cosmic Ray Conference will be held in August 2011 in the Olympic Center, Beijing, China

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last 10 press releases:

• Educational seminars for young scientists of AANL
• Armenia become member of SCOSTEP!
• A.Alikhanyan national lab purchase high purity germanium gamma-detector for nuclear physics research and isotope production
• KHEBR laser technological complex, which is unique with its power is launched in AANL
• Ground Breaking ceremony of Nuclear Medecine Center, October 30, 2012
• Visit in Dubna, 3-4 May 2012
• National Scientific laboratory after A. I.Alikhanyan young scientist Artyom Hovhanisyan “Haykyan” award-winner.
• The prime minister visited the National Scientific laboratory after A. I.Alikhanyan
• Center for Cosmology and Astrophysics is established in A.Alikhanyan National Laboratory (AANL)
• The workshop “Low dimensional physics and gauge principles”

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