4/21/2011 Katsushi Arisaka, UCLA 1

University of California, Los Angeles

Department of Physics and Astronomy

arisaka@physics.ucla.edu

Dark Matter Programsat UCLA

Katsushi Arisaka

UCLA Dark Matter Programs Direct Search

David Cline, Katsushi Arisaka, Hanguo WangXe : ZEPLIN-II XENON100 XENON 1TonAr : DarkSide50 DarkSide 5TonG3 : MAX, XAX

Indirect Search Rene Ong VERITAS GAPS Vladimir Vassiliev VERITAS CTA David Saltzberg ANITA

Theory Graciela Gelmini DAMA/CoGeNT Alex Kusenko Sterile Neutrino

4/21/2011 Katsushi Arisaka, UCLA 2

XENON100 Detector

4/21/2011 Katsushi Arisaka, UCLA 3

162 kg(48 kg)

4

90% CL Limits of SI Cross Section

4/21/2011 Katsushi Arisaka, UCLA

100 days, 48 kg, 3 events

Photo Cathode(-6 kV)

APD (0 V)

Quartz

Quartz

Al coating

APD (0 V)

Photo Cathode(-6 kV)

QUPID (QUartz Photon Intensifying Detector)

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Katsushi Arisaka, Hanguo Wang

6

XENON1T

4/21/2011 Katsushi Arisaka, UCLA

Katsushi Arisaka, Hanguo Wang

7

DarkSide 50 kg 5 Ton

4/21/2011 Katsushi Arisaka, UCLA

CTF Water Tank

LiquidScintillator

3” QUPID(19 top + 19 bottom)

Depleted Ar(50 kg)

Hanguo Wang

8

90% CL Limits of SI Cross Section

4/21/2011 Katsushi Arisaka, UCLA

G2

G3

G1

9

Indirect WIMP Detection

c

c

?

W+/Z/H/q

W-/Z/h/q

WIMP Annihilation

(e.g. GC)

g VERITAS, HESS, Fermi …

n IceCube

Telescopes

e- ATIC, Fermi …

Cosmic Ray Expts

p

e+

HEAT, Pamela,AMS

d GAPS

Pamela, AMS

decreasingbackground

Rene Ong, Vladimir Vassiliev

4/21/2011 Katsushi Arisaka, UCLA

VERITAS

12m reflector, f1.0 optics

350 Mirror Facets

500 pixel Camera

Rene Ong, Vladimir Vassiliev

4/21/2011

11

Cherenkov Telescope Array Vladimir Vassiliev

4/21/2011 Katsushi Arisaka, UCLA

GAPS ConceptGAPS consists of two detectors (acceptance ~2.7 m2sr):

Si(Li) Detector (target and tracker): Si(Li) tracker:13 layers of Si(Li) wafers relatively low Z material good X-ray resolution circular modules segmented into 8 strips

3D particle tracking 270 per layer (total: ~3500) timing: ~50 ns dual channel electronics

5-200 keV: X-rays (resolution:~2 keV)0.1-200 MeV: charged particle

Time of flight and anticoincidence shield:

plastic scintillator with PMTs surrounds tracker

track charged particles, dE/dX velocity measurement anticoincidence for charged particles

TOF

tracker

~3m

~4m~4m

LD Balloon flight in 2015 ?

Rene Ong

4/21/2011

13

Sterile Neutrinos

4/21/2011 Katsushi Arisaka, UCLA

Alex Kusenko

14

DAMA/LIBRA vs. XENON100

4/21/2011 Katsushi Arisaka, UCLA

Graciela Gelmini

UCLA Dark Matter Programs Direct Search

David Cline, Katsushi Arisaka, Hanguo WangXe : ZEPLIN-II XENON100 XENON 1TonAr : DarkSide50 DarkSide 5TonG3 : MAX, XAX

Indirect Search Rene Ong VERITAS GAPS Vladimir Vassiliev VERITAS CTA David Saltzberg ANITA

Theory Graciela Gelmini DAMA/CoGeNT Alex Kusenko Sterile Neutrino

4/21/2011 Katsushi Arisaka, UCLA 15