John W Conklin for the GWSIG University of Florida jwconklinufledu Gravitational Wave Decade LISA ranked 2 nd after WFIRST in NWNH 2030 BICEP 2 2014 aLIGO VIRG0 detection 2020 Decadal ID: 787527
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Slide1
LISA in the Gravitational Wave Decade
John W. Conklin for the GWSIGUniversity of Florida, jwconklin@ufl.edu
Slide2Gravitational Wave Decade
LISA ranked
2
nd
after WFIRST in
NWNH
2030
BICEP 2 (2014)
aLIGO
/VIRG0 detection
2020 Decadal
PTA detection
2020
2010
eLISA
Launch (2034)
Selected for L3 (late 2013)
LISA Pathfinder (Oct 2015)
Slide3Advanced LIGO
Advanced LIGO construction completed on-time & on-budgetHanford & Livingston handed over to LIGO OperationsaLIGO O1 starts 15 September with 3-3.5x LIGO sensitivity
Credit: LIGO Lab
~10x sensitivity
~10
3
x rate
Slide4Milli-second Pulsars
GWs at the Earth cause correlation between arrival times of radio waves from MPSs.SMBH-SMBHPrimordial, Cosmic strings, …
Slide5Currently: ~50 MSPs (IPTA)
with 10-100 ns timing residuals
D
etection within current
decade plausible
Pulsar Timing Arrays
Slide6Slide7eLISA
Science
Slide8International contribution ;-)
The
eLISA
Mission
Slide9L3 Schedule and Activities
Pre-L3 selection: eLISA system study (Airbus, financed by DLR)System trade-offs & technology roadmap; report out soon
Gravitational Observatory Advisory Team (GOAT)
4 meetings +
telecons
so far; intermediate report
released last FridayPhase A start (mission concept selection): 2018Payload EM: 2019-2024
Start of phase B1: 2022
Slide10LISA Pathfinder
Technology goal:Sa1/2 <3×10–14 m/s2Hz1/2
S
oms
1/2
< 9×10–12 m/Hz1/2Model validationLISA Technology Package (ESA)
Two Gravitational Reference SensorsLocal laser interferometersTM-to-TM + TM-to-S/C + …Cold gas propulsion (GAIA)Drag-free control logicSpace Technology 7 (NASA)Colloid thrustersDrag-free Control logic
LISA Tech. Package
Slide11Acceleration Noise Requirement
GOCE
GP-B*
Slide12Status of Pathfinder
Excellent progress towards launch5 June: Payload/spacecraft integration 30 June: Acoustic test10 August: Flight Acceptance Review19 August: Ready to ship to KourouExtensive ground operations tests
Slide13Slide14LISA Pathfinder Launch
30 Sept: LPF ready for launchArianespace requires four months between Vega launches Mid/late-Oct: earliest possible launchMid-Nov: likeliest launch date
5
th
Vega launch, 23 June Sentinel-2a
Slide15Pathfinder Flight Operations
Cruise: 60 days
Commissioning: 14 days
LTP Science: 90 days
DRS Operations: 90 days
Slide16U.S. Technology Efforts
Telescope (NASA GSFC, J Livas)Prototype off-axis telescope toverify scattered light modelsLaser system (NASA GSFC, J Camp)2 W ECL in MOPA configurationColloidal thrusters (JPL, J Zeimer)Phasemeter (JPL, W. Klipstein
)
Novel optical bench
(
UF, G Mueller)GRS technologies (UF, J Conklin
)Torsion pendulum facility: < 10–12 m/s2Hz1/2AI GW observatory
technology(Stanford, J Hogan, M Kasavich)
Off-axis telescope spacer
UF torsion pendulum
Extended cavity laser
Slide17GRACE Follow-on
Joint NASA-DLR Earth geodesymissionLaunch in 2017First satellite-to-satellite laserinterferometer demonstrationBorrows tech developed for LISA
GRACE Follow-on
Laser Ranging Instrument
Slide18GWSIG Activities
Neil Cornish (chair), John Conklin (vice-chair)Events (in addition to weekly telecons):GWSIG splinter meeting @ April APS, Baltimore 11 April 2015Panel discussion @ Special HEAD meeting, Chicago 1 July 2015Joint-PAG session + GW booth@ IAU General Assembly, Honolulu 7 August 2015Joint-PAG virtual town hall August 2015GWSIG splinter meeting @ AAS meeting, Kissimmee January 201611th
LISA Symposium, Zurich September 2016
GWSIG Email list
Google:
nasa
gwsag
Slide19Hertz Charge to PAGs
Gravitational Wave Surveyor (LISA) excluded from list of big 42010 Decadal: LISA is #2 priority large mission after WFIRSTWG community general consensus:L3 is an important opportunityViable NASA-ESA partnership on L3 requiresStrong recommendation by 2020 decadal committeeTechnology development (now) in cooperation with EuropeGravitational Wave Surveyor study to inform the 2020 decadal:Technology assessment: U.S. strengths + new developmentsRange of options for U.S. participation and contributionsUpdate science case based on knowledge gained since 2010
Assess size + scope of U.S. LISA Science Team, data center, and mechanisms for astrophysics community involvement
Slide20State of GW during 2020 Decadal
LISA ranked
2
nd
after WFIRST in
NWNH
2030
BICEP 2 (2014)
LISA Pathfinder (Oct 2015)
aLIGO
/VIRG0 detection
2020 Decadal
PTA detection
2020
2010
eLISA
Launch (2034)
Selected for L3 (late 2013)