d.v.skobeltsyn inp moscow state university
DESCRIPTION
D.V.Skobeltsyn INP Moscow State University. TUS/KLYPVE Collaboration. V. Alexandrov, D. Bugrov, G. Garipov, N.Kalmykov, B.Khrenov, M. Panasyuk, S.Sharakin, A. Silaev, I. Yashin. JINR, Dubna, Russia. V. Grebenyuk,M. Finger, - PowerPoint PPT PresentationTRANSCRIPT
D.V.Skobeltsyn INP Moscow State University
“Energia” Korolev(Rocket Space Corporation)
“Luch” Syzran SCTB, Russia
JINR, Dubna, Russia
Mexico University, Mexico
Ewha Womans University Seoul, South Korea
UHECRs measurements fromSpace via detection of fluorescent and Cherenkov light produced by EAS
TUS:
Goal:
1.5 m diameter Fresnel MirrorBackground measurement dozens events per year with E>1020 eV
TUS2: Double TUS
KLYPVE:3.5 m diameter Fresnel Mirror#103 events per year#102 events with E>1020 eV
V. Alexandrov, D. Bugrov, G. Garipov, N.Kalmykov,B.Khrenov, M.
Panasyuk, S.Sharakin, A. Silaev, I. Yashin
V. Grebenyuk,M. Finger, A. Zhuchkova, D. Naumov, Nguen Man
Sat, A. Olshevsky, B. Sabirov,L. Tkatchev, N. Zaikin
O. Saprykin, V. Syromyatnikov
E. Bitkin, S. Eremin, A. Matyushkin, F. Urmantsev
A. Cordero, O. Martinez, E. Morena, C. Robledo,H. Salazar, L. Villaseeor,
A. Zepeda
I. Park
NIO KOMPAS, Czech Republic
M. Shonsky
Technical University, Prague, Czech RepublicJ. Zicha
Ultra High Energy Cosmic Rays (UHECRs)
GROUND BASED DETECTOR DATA ON UHECR
Energy, eV
1st knee
Modulated by solar activity
1 particle per m2×second
1 particle per m2×year
2nd knee
Ankle1 particle per km2×year
What is their origin? Top-down? Bottom-up? Source?
What is the nature of UHECRs?p,Fe,,
What is their spectrum?consistent with GZK (p+2.7 p + 0)?
Energy, eV
aqqqqEnergy, eV
Concept ofTUS/TUS2 space free flyer
16x16
PMTs
Fresnel mirror10 rings
Focal distance is 1.5 mField of View is 7.3o
mold production in JINR/DubnaSpace qualified carbon-plastic Fresnel mirror to be producedAt “Luch” (Syzran)
Mirror moldsection
Ring number
The light spread radius on the focal plane:
90%
80%
70%
Measured vs theory
Measured - theory
[mm]
SLAST package:1. 3D Geometry2. Various Atmosphere profiles3. GIL parameterization of
CORSIKA4. Hillas parameterization for the
energy distribution 5. First interaction of nuclei or
neutrino from cross-section6. Fluorescence as a function of
altitude in the atmosphere and the shower age
7. Cherenkov light simulation8. LOWTRAN7.1 atmosphere
response
Electronics Simulation:1. Analog & Digital2. Multi-Level trigger system with
two modes: “vertical” & horizontal showers
Even
ts p
er
year
TUS
KLYPVE
Reconstruction: (under way)1. Arrival direction2. Hmax and Xmax for :
1. Golden events2. Fluorescent events
3. Energy
TUS relative resolution of Hmax as a function of zenith angle for:
Golden Events
Fluorescent Events
Cherenkov echo gives usa reference point to reconstruct Hmax for golden events.
Temporal profile of (quasi) horizontalshowers is sensitive to Hmax. Thismakes possible to reconstruct Hmax (and Xmax) for events withoutCherenkov echo.
Both methods are complementary to each other.
The real background need for all space based experimentsdozens of events above 1020 eV more than the world current statistics (with overall sky coverage)
TUS will measure in one year:
TUS as a space based experiment will:
Test the approach preparing for the next generation of experiments: EUSO, KLYPVE,OWL and OTHERS!