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X e n o n D o p i n g o f L i q u i d A r g o n D e n v e r Wh i t t i n g t o n ( o n b e h a l f o f t h e x e n o n d o p i n g w o r k i n g g r o u p ) S P P h o

  1. X e n o n D o p i n g o f L i q u i d A r g o n D e n v e r Wh i t t i n g t o n ( o n b e h a l f o f t h e x e n o n d o p i n g w o r k i n g g r o u p ) S P P h o t o n D e t e c t i o n R e v i e w N o v . 1 2 , 2 0 1 8 You Inst Logo You Inst Logo

  2. C o n t e n t • E fg e c t s o f x e n o n d o p a n t • P h y s i c s B e n e fj t s - T i m i n g , w a v e l e n g t h s t r u c t u r e , u n i f o r m i t y , d e s i g n s i m p l i fj c a t i o n • C r y o g e n i c s - I n j e c t i n g , m a i n t a i n i n g , m o n i t o r i n g , c o s t • T P C I n t e r a c t i o n - C h a r g e a t t e n u a t i o n , H V s t a b i l i t y 2 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  3. L i q u i d A r g o n S c i n t i l l a t i o n M e c h a n s i m • E x c i t a t i o n o f s h o r t - l i v e d a r g o n m o l e c u l a r s t a t e s . Recombination e- Ar Ar 2 + 128 nm 35% 65% 7 ns Ionization Ar Ar Ar 2 * Ar+ (singlet) e- 1.6 μs μ- 50% Ar 2 * Ar* 50% (triplet) Ar Self-Trapped Excitation 3 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  4. E fg e c t s o f X e n o n D o p a n t • C o l l i s i o n a l e n e r g y t r a n s f e r f r o m a r g o n e x c i m e r t o x e n o n e x c i m e r 174 • H a p p e n s o n a f a s t e r t i m e s c a l e t h a n A r t r i p l e t l i f e t i m e . – T r i g g e r s t r i p l e t e m i s s i o n t o p r o d u c e a f a s t e r s i g n a l – C o n v e r t s s c i n t i l l a t i o n l i g h t t o 1 7 4 n m . 4 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  5. E fg e c t s o f X e n o n D o p a n t • R e c e n t fj n d i n g s • I n c r e a s i n g s h i f t o f s c i n t i l l a t i o n t o 1 7 4 n m w i t h a d d e d x e n o n d o p a n t TU Munich 2014-2015 5 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  6. E fg e c t s o f X e n o n D o p a n t • R e c e n t fj n d i n g s DUNE Double-Shift Light Guides Pure LAr PAB (Blanche) 2016 6 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  7. E fg e c t s o f X e n o n D o p a n t • R e c e n t fj n d i n g s DUNE Double-Shift Light Guides ~20 ppm Xe in LAr PAB (Blanche) 2016 7 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  8. E fg e c t s o f X e n o n D o p a n t • R e c e n t fj n d i n g s DUNE Double-Shift Light Guides ~60 ppm Xe in LAr PAB (Blanche) 2016 8 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  9. P h y s i c s B e n e fj t s • T i m i n g SiPM signal structure Time structure of incident photons Pure LAr Pure LAr DUNE Double- DUNE Double- Shift Light Guide Shift Light Guide PAB (Blanche) 2016 9 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  10. P h y s i c s B e n e fj t s • T i m i n g – R e d u c e d fm a s h o v e r l a p f r o m l a t e - l i g h t s i g n a l s – M a i n t a i n s s u b - T P C - t i c k l e a d i n g - e d g e t i m i n g r e s o l u t i o n SiPM signal structure Time structure of incident photons ~20 ppm ~20 ppm DUNE Double- DUNE Double- Xe in LAr Xe in LAr Shift Light Guide Shift Light Guide PAB (Blanche) 2016 1 0 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  11. P h y s i c s B e n e fj t s • Wa v e l e n g t h s t r u c t u r e DUNE-style Dip-Coated Light Guides PAB (Blanche) 2016 1 1 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  12. P h y s i c s B e n e fj t s • Wa v e l e n g t h s t r u c t u r e DUNE-style Dip-Coated Light Guides PAB (Blanche) 2016 1 2 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  13. P h y s i c s B e n e fj t s • Wa v e l e n g t h s t r u c t u r e DUNE-style Dip-Coated Light Guides PAB (Blanche) 2016 1 3 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  14. P h y s i c s B e n e fj t s • Wa v e l e n g t h s t r u c t u r e Light detected with PMTs (sensitive to different wavelengths) V. Ippolito, F. Pietropaolo, H. Wang, Y. Wang, 2018 1 4 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  15. P h y s i c s B e n e fj t s • Wa v e l e n g t h s t r u c t u r e PAB (Blanche) 2016 • M o s t s c i n t i l l a t i o n l i g h t i s c o n v e r t e d t o 1 7 4 n m – D e t e c t o r s t y p i c a l l y m o r e e ffj c i e n t – M a t e r i a l s m o r e r e fm e c t i v e – L o n g e r R a y l e i g h s c a t t e r i n g l e n g t h 1 5 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  16. P h y s i c s B e n e fj t s PAB (Blanche) 2016 • Wa v e l e n g t h s t r u c t u r e • I n d i c a t i o n s o f l a r g e r i n c i d e n t p h o t o n fm u x – A t ~ 2 0 p p m X e i n L A r , ● 1 2 8 n m c o m p o n e n t r e d u c e d t o 1 / 5 o f ≳ t o t a l p u r e L A r s i g n a l ( 8 0 % c o n v e r s i o n t o 1 7 4 n m ) ● 1 7 4 n m c o m p o n e n t a b o u t 1 . 5 t i m e s l a r g e r t h a n t o t a l p u r e L A r s i g n a l ● T o t a l o f a b o u t 3 0 - 7 0 % m o r e p h o t o n s r e a c h e d d e t e c t o r s – ( a b o u t 9 0 % l a r g e r a v e r a g e o n t h e s e d e t e c t o r s ) s i g n a l • N : T h e b e n e fj t s f r o m t h i s e fg e c t w i l l d e p e n d o n t h e r e l a t i v e o t e e ffj c i e n c y o f t h e d e t e c t o r t e c h n o l o g y a t 1 2 8 n m v s 1 7 4 n m . 1 6 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  17. P h y s i c s B e n e fj t s • U n i f o r m i t y – R e d u c e d R a y l e i g h s c a t t e r i n g i m p r o v e s v i s i b i l i t y n e a r C P A DUNE Simulation ~6 times longer Rayleigh scattering length 1 7 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

  18. P h y s i c s B e n e fj t s • D e s i g n S i m p l i fj c a t i o n s – P o t e n t i a l t o r e m o v e o u t e r w a v e l e n g t h s h i f t e r f r o m l i g h t c o l l e c t o r m o d u l e s ● U V l i g h t p a s s e s d i r e c t l y i n t o l i g h t - t r a p p i n g v o l u m e 174 nm shifted light No need for outer wavelength shifter – S u b s t a n t i a l l y r e d u c e c o s t – R e m o v e l i g h t e x p o s u r e m i t i g a t i o n r e q u i r e m e n t s ( l i g h t fj l t e r s ) 1 8 You Inst Logo D e n v e r Wh i t t i n g t o n | X e n o n D o p i n g o f L i q u i d A r g o n You Inst Logo

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