LHC L1034 cm2 s1 HLLHC L5 x 1034

  • Slides: 39
Download presentation

Радиационные нагрузки на современных и планируемых ускорителях LHC L=1034 cm-2 s-1 HL-LHC L=5 x

Радиационные нагрузки на современных и планируемых ускорителях LHC L=1034 cm-2 s-1 HL-LHC L=5 x 1034 cm-2 s-1 (250 -300)fb-1/y 2025 y and 40 fb-1 /y 2016 y FAIR L=10 32 cm-2 s-1 NICA L=10 27 cm-2 s-1 ions Au 79+ Super KEKB L=8 x 10 E 35 cm -2 s-1 НE CMS 10 Mrad for 10 years ATLAS Total dose picture for year Mu 2 e detector 1011 n/cm 2 /3 y near CRV-TS 2

Main properties of organic scintillators (OS): short decay time (a few ns); easy manufacture

Main properties of organic scintillators (OS): short decay time (a few ns); easy manufacture of OS in almost any shape, cheapness; reliable and stability of characteristics PS (1 -2)% PPO(PTP) (0. 02 -0. 04)% POPOP UV 370 nm 470 nm Item b-PBD BDB Y 7 3 HF Y 11 POPOP K 27 Absorption peak, nm 305 360 437/460 350 400 385 355 Britvich et. al. Emission peak, nm 360 405/425 490 530 476 420 492 3

4

4

Bross, Dalmau Transmission damage PS after immidiate irradiations(a) and full annealing in air (b)

Bross, Dalmau Transmission damage PS after immidiate irradiations(a) and full annealing in air (b) for (1 -100) Mrad Wick e. a. z 2=άt Bleaching SCSN-38 (a) and K 27 WLS (b) after D=24 k. Gy in: (1) O 2; (2) dry air Recovery of SCSN-38 under different gas atmosphere Very vast in O 2, ~ 2 -3 days very slow in inert gases > 200 days 5

Sci. Fi Tracking at High Luminosity Colllider (LHCb) Joram e. a. 35 k. Gy

Sci. Fi Tracking at High Luminosity Colllider (LHCb) Joram e. a. 35 k. Gy за 10 лет вблизи пучка Ожидаемые потери при Д=1 k. Gy ~ 40% 8

Scintillating (Sci. Fi) fibers [J. Bisplinghoff e. a. ] Sci. Fi Hodoscope for COMPASS

Scintillating (Sci. Fi) fibers [J. Bisplinghoff e. a. ] Sci. Fi Hodoscope for COMPASS 108 muons/s 10 6 /fiber channel 1 mm SCSF -78 MJ D=100 k. Gy(10 Mrad) , Erlangen tandem accelerator Light output loss no more than 15%. Light attenuation lengths of clear fibres PSMJ before and after irradiation 10 k. Gy (galo region). Difference 3 times 1. Joint of two fibers ends by means of melting them at T =(1050 -1100) C within several seconds provides mechanically strong connection which doesn't lead to losses by light transmission. 2. Light loss in case of using only WLS fiber is 60% instead of 20% in case of using WLS+clear fibers 9

Light yield comparision of BCF 91 A-MC(Bicron), Y 11(200)MSJ (Kuraray) and S 250 -100(Pol.

Light yield comparision of BCF 91 A-MC(Bicron), Y 11(200)MSJ (Kuraray) and S 250 -100(Pol. -Hi. Tech. ) WLS fibers for D= 1. 16 k. Gy and 6. 93 k. Gy M. J. Varanda et. al. Co 60 D=1. 16 k. Gy and 6. 93 k. Gy 1 mm WLS fibers LY for D=1. 16 k. Gy Light loss 13% 1. Kuraray fiber has the best LY and Latt. 2. Relative light losses are 17 (46)%(BCF 91 A), 13(29)% (Kuraray and 40(45)% (Pol-Hi. Tech for D=1. 16 (6. 93) k. Gy LY for D=6. 93 k. Gy Light loss 29% 12

WLS fiber and scintillator + WLS fiber Alfaro e. a. Co 60 BC-404 +

WLS fiber and scintillator + WLS fiber Alfaro e. a. Co 60 BC-404 + BSF-99 -29 MC D= 50 krad - 1 Mrad, Rate 4. 4 krad/min 80% permanent level reached after 300 h for D=200 krad BSF-99 -29 MC D= 50, 100, 200, 300, 650 krad, 1 Mrad Rate 7 krad/min 1. Recovery time of fibers 2 orders of magnitudes is shorter than of scintillator for D=200 krad 2. Permanent level is only 50% (70%) for D=1 Mrad (650 krad). 3. Time recovery increases significantly at high doses. D=50, 100, 200, 300 krad D=650 krad, 1 Mrad 13

Enikolopov Institute of Synthetic Polymer Materials, Moscow Образование света в полистироле и NOL сцинтилляторе

Enikolopov Institute of Synthetic Polymer Materials, Moscow Образование света в полистироле и NOL сцинтилляторе NOL 11 λemis= 397, 421, 445 nm ε=96% τ=0. 98 ns NOL 19 λemis= 436, 466, 490 nm ε=87% τ=0. 93 ns 15

Mu 2 e project, CRV modules about 6 m long strips with holes 16

Mu 2 e project, CRV modules about 6 m long strips with holes 16

18

18

20

20

22

22

23

23

24

24

25

25

A. Maio, e. a. Dose rate effect on 60 Co Ф 1 mm ,

A. Maio, e. a. Dose rate effect on 60 Co Ф 1 mm , 2 m long BCF 99 -28, BCF 99 -28 UVA, ВСF 91 A (DC) Y 11(200)MS и Y 11(200) MS UVA S 048 -100 N 4 и S 048 -100 UVA (Bicron), (Kuraray) ( Pol. Hi. Tech. ). Dose rates (0. 55, 1. 1 and 4) krad/h D=140 krad 80% γ + 20%n Dose rate 1, 5 Mrad/h D=1 Mrad Recovery time about 6 days( no difference observed between 6 -20 days after irradiation) Permanent damage 28% for Y 11(200) and (21 -24)% fof BCF 91 A No dose effects ? ? Left – 1 h after irradiation Right – recovery of Y 11(200) 26

Item Absorption, nm Re-emission, nm b-PBD 305 366 BDB 360 405/425 Y 7 437/460

Item Absorption, nm Re-emission, nm b-PBD 305 366 BDB 360 405/425 Y 7 437/460 490 3 HF 350 530 POPOP 370 470 Бритвич и др. 27

Borshchev e. a. 28

Borshchev e. a. 28

29

29

30

30

31

31

32

32

Bodmann, n irradiation 33

Bodmann, n irradiation 33

34

34

Hara 35

Hara 35

3. 4. 5. 6. 7. Yu. Kharzheev, New trends in using scintillation counters in

3. 4. 5. 6. 7. Yu. Kharzheev, New trends in using scintillation counters in modern high energy physics experiments// Mongolian journal of physics issue 2 Ю. Н. Харжеев, Сцинтилляционные счетчики в современных экспериментах физики высоких энергий (обзор) //ЭЧАЯ = Physics of Part A. Artikov, V. Baranov, Ju. Budagov, D. Chokheli, Yu. Davydov, V. Glagolev, Yu. Kharzheev, V. Kolomoetz, A. Shalugin, A. Simonenko and V. M. Abazov et. al. (D 0 collaboration), Electron and Photon Identification in the D 0 Experiment // Nuclear Instruments & Methods in Physics V. M. Abazov et. al. (D 0 collaboration), Muon Reconstruction and Identification with the Run II D 0 Detector // Nuclear Instruments & Method 8. A. Artikov, V. Baranov, Ju. Budagov, M. Bulavin, I. Vasiljev, Yu. Davydov, V. Glagolev, V. Kolomoets, A. Simonenko, Yu. Kharzh 36

38

38

40

40