Cavendish Laboratory
 
Cavendish Laboratory
Transition Edge Sensor   Bolometers
 
Detector Physics Group at the
Cavendish Laboratory
DPG activities
,DPG capabilities
,This talk ,TESs 7or CMB polari6ation e8periments
 
Detector Physics Group at the
Cavendish Laboratory
Cl-%E9 TE#M
,Cambridge : M D #udley" B Barker" M Bro$n" M Crane" D Glo$acka" D Goldie" 1 Grainge" # Lasenby" ; Stevenson" D Titterington" % Tsaneva" S 'ithington
,Cardi77 : P#9 #de" P G Calisse" ' Gear" $ Grainger" P ;argrave" !" ;ouse" 1 2saac"" B 1iernan" P Mauskop7" S Parsley" G Savini" 9 % Sudi$ala" C Tucker" 9 Tucker" 2 'alker" M 'hitehead" ! <hang
,Manchester : L Piccirillo" P Diamond" # Galtress" % ;aynes" P Leahy"
S Le$is" B Ma77ei" L Martinis" S Melhuish" G Pisano" 9 'atson"
,-87ord : M Brock" P Cabella" P .erreira" P Grimes" B !ohnson" M !ones" ' Lau" ! Leech" D -=Dea" C &orth" D Sutton" # Taylor" G >assin
,&2ST? 1 D 2r$in
Detector Physics Group at the
Cavendish Laboratory
1ey .eatures o7 CL-%E9
• Two telescopes measuring polarization of CMB: , L.( +@ G;6 , ;.( combined A* and ))* G;6 7ocal plane
L.( + horns A+) 7inline?coupled detectors at +@ G;6
• Focal Plane: he8agonal array o7 horns" t$o polari6ations per horn
• Detectors: Bolometers $ith superconducting transition edge sensors /TES0
• Readout: Time?division S452D multiple8er /&2ST" 5BC0
• Sensitivity: limited by unavoidable photon noise /))8A*!" 'F;60
;.( A+) horns A+) H?probe -MTs in mi8ed A*F))* G;6 7ocal plane
• #perating Temperature: A** m1 /active control o7 bath temperature0
 
Detector Physics Group at the
Cavendish Laboratory
'hy Microstrip?coupled TESsI
• TES design can be optimised separately and doesn=t have to change
i7 the array architecture changes
• Can include planar band?pass 7ilters" phase shi7ters" modulators etc
simple detector becomes multi?7unction integrated circuit
• Calibration
 
Detector Physics Group at the
Cavendish Laboratory
'aveguide probes
Grounding ring
Cl-%E9 TES Detector Designs
 
Detector Physics Group at the
Cavendish Laboratory
TESs 7or Cl-%E9
 
Detector Physics Group at the
Cavendish Laboratory
Detector Physics Group at the
Cavendish Laboratory
,Single metali6ation layer 7or critical dimensions
,-87ord design
Detector Physics Group at the
Cavendish Laboratory
 
Detector Physics Group at the
Cavendish Laboratory
Detector Physics Group at the
Cavendish Laboratory
sources alone.
  $ith G A@) p'F1
Detector Physics Group at the
Cavendish Laboratory
A**K and
Detector Physics Group at the
Cavendish Laboratory
 
Detector Physics Group at the
Cavendish Laboratory
,Could already populate an N array
 
Detector Physics Group at the
Cavendish Laboratory
Cl-%E9 ;. C;#&&EL
,A* and ))* G;6 channels use probes suspended on Si&8 membrane across circular $aveguide
,Cardi77 r7 design
 
Detector Physics Group at the
Cavendish Laboratory
.our?probe -MT 7or ;. instrument
Detector Physics Group at the
Cavendish Laboratory
Detector Physics Group at the
Cavendish Laboratory
Po$er Multiple8ing
Detector Physics Group at the
Cavendish Laboratory
 
Detector Physics Group at the
Cavendish Laboratory
Materials Characteri6ation 2
,1 9ostem et al. ! Lo$ Temp Phys /)**0 AA( @:A
,!ohnson noise thermometry ,Thermal conductance studies ,Crucial 7or ne8t generation lo$ background TESs
 
Detector Physics Group at the
Cavendish Laboratory
Materials Characteri6ation 22
 
Detector Physics Group at the
Cavendish Laboratory
Materials Characteri6ation 222
,Lab on a chip Ast generation ,'ideband measurements o7 microstrip losses
,1 9ostem et al  ! #ppl Phys !%&" *H*+ )**+
 
Detector Physics Group at the
Cavendish Laboratory
,;o$ to make lo$ G close?packed arraysI
,Lo$ G TESs 7or lo$ po$er applications
 
Detector Physics Group at the
Cavendish Laboratory
-ptical Modelling
Detector Physics Group at the
Cavendish Laboratory
,;igh optical detection e77iciency 7or both 7inline and probe?coupled designs
,Satis7y Cl-%E9 reOuirements 7or dark &EP" po$er handling and response time
,Packaging?shielding complete
 
Detector Physics Group at the
Cavendish Laboratory
The .5T59E
,9ecently kicked?o77 ES# T9P Cardi77FS9-&FMaynoothF9#L ,&e8t generation TESs 7or space missions ,.ar?29 TES detectors ,5ltra?lo$ noise CMB B?mode detectors
,Cl-%E9 a signi7icant legacy a signi7icant opportunity