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23rd ECRS-2012SINP, MSU, Moscow,3-7 July, 2012
Piero Spillantini, University and INFN, Firenze, Italy1
Poster reviewingPrimary CR_1: E<1PeV (38 posters)
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Outline1) Data and data analysis
with Pamela pcr_1_353,383,452,473,477,641,643,659with ARGO-YBJ pcr_1_389,476 with ATIC-2 pcr_1_456with Doch-4A pcr_1_536,537
with Carpet-2 pcr_1_576 ‘Fractionally charged’ pcr_1_733
2) Instruments and methods New project pcr_1_319, Prototypes pcr_1_527, 544, 556 Status pcr_1_391,538 New methods cr_1_541,549,623,627,638,723,724
3) Theory and Phenomenology pcr_1_165,184,196,464,516,518,571,665
2
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Data and data analysis:PAMELA
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353
-stand-alone trigger in calorimeter GF: 20 600 cm2sr 3000 ev in 5y- reconstruction by multistep fitting- isotropy map creation (5°x5°)
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383
-Work in progress on identification capability for light nuclei isotopes with multiple de/dx in cal.- expect provide new data of 6Li, 7Li, 7Be and 9Be, separation 9Be-10Be seems possible
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452
et al.
-DRD model fit better e+ flux at low energies- PD and DR models fail to describe data
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473
TOF stand-alone
Calorimeter stand-alone
Slow-down effect
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477
-Improvements of the d identification enhanced p suppression + decrease systematics- improvements: truncated mean values of de/dx in tracker + added de/dx in 6 TOF counters
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641
-PAMELA covers full sky search for global anisotropies possible- search at large scale anisotropies (30°-90°) for e- and e+ with E>40 GeV + around SUN direction- preliminary: arrival directions consistent with isotropic expectation
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643
-L-shell 1.12-1.5 available for PAMELA, peak of pitch-angular distribution is narrow- angular resolution <4°, e>60 MeV, 5 year statistics- measured quasitrapped on boundary of rad belts ane HE (>1GeV) trapped and quasi-trapped-- result: p, e-, e+ local and equatorial pitch-angular distributions
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659
-Antip selection with Multivariate analysis- increased statistics (2800 antip) and energy range
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Data and data analysis:other
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389
-Data with zenith<15° and core in 40x40 m2, correlation with pressure and temperature- CR generated in 100 GeV-4PeV, shower simulated by CORSIKA- medium energy p 4.5-56 TeV, He 9-90 TeV
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476
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-Arrival direction information on source distribution + propagation medium + diffusion- anisotropy 10-4-10-3 in TeV CR arrival direction in angular scalea 10°-180°- new details of CR distribution in 10°-70°
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456
(Ti+V+Cr)/Fe (Z=16-24)/Fe
-Upturn can be understood with CG+B (B: bubble with embedded sources) model- Upturn near 200-300 GeV/n predicted but index 2.5
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536
-Continous operation of ‘Doch-4M,A’ could not reproduce ‘Erzions’ found in Doch-4 in 1999- many material used to convert neutral Erzions in charged detectable Erzions- New device used in 2012 once was not able to reproduce previous results
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537
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576
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733
- In Aragats a group of 4e/3 charge events with HE (>80GeV)- In ATIC-2 ‘additional events’ with ionization 0.53 of proton
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Projects, instruments, New methods
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527
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-Prototype of PRISMA project, run on the NEVOD basis- 32 new type ‘en.detectors’ sensitive to em component and hadrons (through thermal n).thin inorganic scintillator (ZnS(Ag) + LiF enriched with 6Li) sensitive to thermal n (fast response, 50 photoelectron per n-capture)- Seeking EAS core position, size (Nn) and age (using em component)
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- Can identify possible signatures from nearly SNRs (e.g. Vela) in e spectrum-Has the potential to detect e and gamma signals from dark matter annihilation/decayWith excellent energy resolution 2%-Can measure the spectra of individual elements in CRs with unprecedented accuracyApproaching the ‘knee’ region-Ultra heavy nuclei up to Z=40 in 5 y- B/C up to 5TeV/n (5y)
Acceptance: 0.12 m2sr e, p-Fe 0.10 gammas 0.40 ultra heavy nuclei
Energy resolution: 2% e, gammas @ E>100 GeV40% p @ 1TeV30% nuclei @ 50 GeV/n
Angular resolution <1°Charge resolution 0.15-0.30 for Z=2-26e/p rejection power 105
Mass 650 kgPower 650 W
Launch date FY 2014Launch carrier HTV-5
120
TASC
TASC-FEC PD
IMC
20
156.5
240
320
712
100
IMC-FEC
MAPMT
32
95
SIAElectronics
448
540
TASC-FEC PD
20
156.5
240
320
712
100
IMC-FEC
MAPMT
32
95
IMC-FEC
MAPMT
32
95
SIA+TIDElectronics
448
540
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544
-Low/moderate solar activity in June 2011: used to investigate response large modular CR det.- smart design: assembling new CR monitors with He counters in different length- registered intensity well accounts for the macro prturbations in near Earth Space
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556
-New kind of track-pits, with specific pit-form and very small size- CN-85 exposed on satellite in 1995- considered very short (<3m) tracks (solar protons and stopping recoil nuclei)- from layer-to-layer investigation: a three of pit swarm correlated with the endof the track formed by high ionizinf primary charged particles (stopping ofoegative charged Herzions?)
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391
Deployed on ISS and taking data from May 2011- tracker: expected behavior, stable on temperature, pedestals, noise
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538
- 3 well known counters BP28 + 12 new model LND2061- Preliminary: the two types are compatible- New acquisition board used
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541
-Study of EAS offers a unique way to extract p-air interaction cross section-Pointed out some limitation of standard technique-New approach involving simultaneous measurement of absorption of EAS and attenuation of electron component is proposed
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549
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623
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627
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638
(n) (p)
- GEANT4 simulation framework PLANETOCOSMICS- Good agreement with Data
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724
- One half of p events had no track in the EC-New geometrical reconstruction tested on ¼ of events-Both methods give the same result-An unknown component could be present in the primary particle flux-Processing of additional events necessary to obtain significant data
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Theory and computations
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165
Hig energy neutrons used for investigating gas and dust in Kuiper belt
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184
Antip and antin
-Atmosf. Antip and antin (5-300 g/cm2)by CORSIKA - Hadronic interactions SYBILL & FLUKA- Match well BESS-2001 in 1-3GeV
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196
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464
--First order Fermi diffuse shock acceleration unifying factor production HE particles-Differential index determined by Mach number (2.5 for CR)-Knee due to decreasing number of sources for >1014 eV -Spectrum calculated by solving first-order Fredhom equation comprising convolution of first Fermi equation with increasing particle rigidity
464
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516
-Fractional diffusion model to describe propagation from sources-e- and e+ injected by sma sources wityh same index (2.85)-e+/e increases to 0.22 for >100GeV
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518
An
-Proposed an Anomalous Diffusion (AD) model for solving the ‘knee’ problem-Anomaly from large paths length between magnetic domains-Contribution r<1kpc and t<105 y sources defines spectrum and provide knee-Behavior of H/He observed by PAMELA reproduced
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571
-Proposed an Anomalous Diffusion (AD) model for solving the ‘knee’ problem-Simulationof random walk processes in one-dimensional case-p(r) distribution from MC agrees with analitical solution (fig.1)-p(r) at different times-Finitness of velocity on shape is neglegible
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665