СТАТУС ПРОЕКТA NUSTAR ЭКСПЕРИМЕНТЫ НА РЕЛЯТИВИСТКИХ РАДИОАКТИВНЫХ ПУЧКАХ УСКОРИТЕЛЬНОГО КОМПЛЕКСА FAIR ( GSI, DARMSTADT, GERMANY ) - презентация

1 СТАТУС ПРОЕКТA NUSTAR ЭКСПЕРИМЕНТЫ НА РЕЛЯТИВИСТКИХ РАДИОАКТИВНЫХ ПУЧКАХ УСКОРИТЕЛЬНОГО КОМПЛЕКСА FAIR ( GSI, DARMSTADT, GERMANY )

2 R3B Russian participation: Neutron detector, gamma spectrometer, active target. РНЦ КИ, ОИЯИ, ПИЯФ, РФЯЦ-ВНИИЭФ

3 FAIR: Beam intensities x 10 4, clean beams, more sophisticated detectors GSI FAIR: SIS-100 Super FRS experimental setups

4 RIB production Rates at FAIR

5 FAIR, NUSTAR, R3B + EXL R3B – studies at external beams of nuclei EXL – studies at internal beams of nuclei at the NESR ring Physics goals: Nuclear density distributions, single-particle structure, shell-occupation probabilities, unbound states, nuclear resonances, transition strengths, astrophysical S factor, giant dipole and quadrupole strength, B(E2), deformations, Gamov-Teller strength, reaction mechanism, nuclear waste transmutation,… Reaction type: Elastic and inelastic pA scattering, total reaction and interaction cross sections, knockout and quasifree scattering, electromagnetic excitation and dissociation, charge-exchange reactions, fission, spallation, fragmentation

6 Experiments with PNPI active targets 1.Diffraction scattering of high energy hadrons: PNPI(Gatchina, ), IHEP(Serpuhov, ), CERN( ) and SACLEY( ). 2.Muon catalyzed pd, dd, dt, dHe3 fusion: PNPI ( ) and PSI ( ). 3.Muon capture experiments at PSI: Muon capture by He-3(1993), Muon capture by proton ( ) and Muon capture by deuteron from Proton diffraction scattering on nuclei (in inverse kine- matics) and nuclei matter distributions (GSI,from1993). 5. Nucleon polarizabilities (IKP-TUD,from 1999).

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8 new IKAR can be used at FAIR for studies of small angular p-A and He-A elastic and inelastic scattering for heavier A (studies at small momentum transfers) IKAR has been already used to study pHe, pLi, pBe, pB and pC elastic scattering

9 132 Sn beam Anode Grid Cathode recoiling proton New IKAR chamber A correction on the energy lost in the central dead region It is necessary to exclude a contribution from ionization by the projectile (a simplest version of the anode)

10 Farouk Aksouh Energy loss and straggling for a 132 Sn beam at 700 MeV/u ΔE [MeV/u] δE [MeV/u] δθ [mrad] - cumulative

11 Signal from the recoil proton and the pedectal signal from the projectile nucleus 17C.

12 Multiple Coulomb scattering of the projectile: δθ s ~ Z/A mrad < t< (GeV/c)2 2 E p < 13 MeV σ tot 600 mb (in previous exp. – 60 mb) θ s < 1 mrad Farouk Aksouh

13 Side view of the new IKAR

14 Anodes of new IKAR

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16 Energy and angular resolution of the ionization chamber(IC) 1. Energy resolution (Eres) depends on the value of the input anode capasity (Ca) and on the amplifier pass band (Tform). Eres(keV)=10+0.2Ca(pF), Eres~20keV (rms) at Ca=50pF. 2. Angular resolution(DFi). Angle(Fi) of recoil particle is defined by rise time(Tr) of the pulse of the anode: Tr=Lga/Va + dZ/Vc, where,Va and Vc are the electron drift velosities in the grid-anode and grid-cathode volumes, Lga is the grid-anode distance. dZ is the projection of the track on the IC axis: sin(Fi)=dZ/R where, R is the recoil particle path. Multiple Coulomb scattering of the recoil particle (DC_Fi) depends from energy and gas pressure: DC_Fi ~3-5mrad (rms).

17 PNPI can fabricate a new IKAR setup with the relevant electronics Main parameters of the new IKAR: anode and cathode diameter – 1.0 m, volume ~1000 l, pressure – from 1 bar up to 25 bar, 2 sections with the cathode-grid distance of 25 cm, highly segmented anodes: 10 rings of 5 cm width, divided on 20 segments in the azimuthal angle, total number of anodes ~200 channels. The chamber can be filled with H 2, D 2, 3 He, 4 He. Effective target length – 40 cm Effective target thickness – 4*10 22 cm -2 Luminosity (I = 10 4 s -1 ) – 4*10 26 cm -2 s -1 E p (max) = 15 MeV, t max = 0.03 (GeV/c) 2 (H 2, 25 bar)

18 (He,He') inelastic scattering Active target from PSI muon capture experiment (MuCap). PNPI TPC in coincidence with Gamma spectrometer (CALIFA).

19 Particle-recoil semiconductor detector Ø 1 м Si detectors d = 100, 300 μm, Si(Li) detectors d = 9 mm, 100x100 mm 2, N 500. Gamma-detector CsI(Tl) crystals, 5000 elements ~ 10mm x 30 mm x mm Si semiconductor detectors and CsI(Tl) gamma detectors – for EXL and R3B

20 Cross-sectional diagram of the MuCap detector

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23 Schematic view of the TPC The trajectories of charged particles are measured in 3D space with resolution (rms) 2-3 mm.

24 The signal on TPC anode wires from -e decay event

25 Properties of an active targets - ionization chambers 1. Filling gas--H2, D2, He3, He4… at pressure 1-25 bar. 2. Registration of all charged particles (p,d,t, He3,He4) inside of an active target with the energy in the range of 1-15 MeV. 3. Energy resolution keV(rms). 4. Efficiency of detection charge particles (T>1MeV) is ~100%. 5. Measurements of the interaction point inside of the gas volume with resolution of ~0.5 mm (rms). 6. Angular resolution ~5 mrad (rms) for recoil particles. 7. Avoiding the wall effects on the level of less than 0.1%.

26 R3B Russian participation: Neutron detector, gamma spectrometer, active target. РНЦ КИ, ОИЯИ, ПИЯФ, РФЯЦ-ВНИИЭФ

27 WBSВид работИсполнители Запраши- ваемая сумма 1.2.5R3B Нейтронный спектрометр (узлы)ПИЯФ1400 k Гамма спектрометр (узлы)РНЦ КИ, ОИЯИ, РФЯЦ-ВНИИЭФ1000 k Активная мишень (полностью)ПИЯФ 1238 k 1.2.9EXL Нейтрон. спектрометр (полностью)ПИЯФ2800 k Кремниевые планарн. детекторыФТИ, ЗАО НИИМВ, ПИЯФ5880 k Толстые Si Li-дрейф. детекторыПИЯФ1000 k Электроника к детекторамФТИ, ЗАО НИИМВ1500 k Гамма спектрометр (полностью)РНЦ КИ, ОИЯИ, РФЯЦ-ВНИИЭФ3626 k Трек. детект. (проп. камеры) (полн.)ПИЯФ 224 к 1.2.3MATS Блок калибровки (полностью)ПИЯФ 275 к Детекторы медлен. частиц (узлы)ПИЯФ 174 к 1.2.6ILIMA Кремниевые детекторы (полн.)ПИЯФ 210 к 1.2.8ELISe Монитор светимости (полностью)РНЦ КИ, ИЯИ 45 к Детекторы LAHReSИЯИ 425 k Запрос на финансирование для экспериментов NuStar

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33 NUSTAR NUSTAR – Nuclear Structure, Astrophysics, and Reactions : HISPEC-DESPEC – High-Resolution In-Flight and Decay Spectroscopy ILIMA - Schottky and Isochronos mass spectroscopy MATS - Mass measurements with Penning Traps LASPEC – Laser Spectroscopy investigations ELISE – Electron scattering in a storage ring AIC – Antiproton Ion Collider R3B – Reactions with Relativistic Radioactive Beams EXL – Exotic Light-ions (exotic nuclei studied in light-ion induced reactions at the NESR ring) Russian participation: R3B, MATS, ILIMA, EXL, ELISE R3B, MATS, - modules 1-3 EXL, ELISE, ILIMA – modules 4-5 Russian participants: РНЦ КИ, ОИЯИ, РФЯЦ-ВНИИЭФ, ЗАО НИИМВ, ФТИ РАН, ИЯИ РАН, ПИЯФ.

34 Work Group Daresbury (R. Lemmon) Liverpool (M. Chartier) Santiago ( D. Cortina?) KVI ( N. Kalantar) Leuven (R. Raabe) St. Petersburg (G. Alkhazov) TUD (T. Kröll?) Edinburgh ( P. Woods?) GSI (D. Savran)

35 Прецизионные измерения масс (и времен жизни) ядер (эксперименты ILIMA и MATS) Цели работы: Тесты ядерных моделей, получение данных для астрофизики (для расчетов r- и rp- процессов), более точная проверка унитарности матрицы CKM Mass measurements in the storage ring (ILIMA) Schottky mass spectrometry ПИЯФ ILIMA (NESR) детекторы распада MATS (ПИЯФ): измерение масс ядер в ловушках Пеннинга