LISA in the Gravitational Wave Decade John W

LISA in the Gravitational Wave Decade John W. Conklin for the GWSIG University of Florida, jwconklin@ufl. edu J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 1

Gravitational Wave Decade a. LIGO/VIRG 0 detection Selected for L 3 (late 2013) BICEP 2 (2014) 2010 e. LISA Launch (2034) 2020 LISA ranked 2 nd after WFIRST in NWNH LISA Pathfinder (Oct 2015) 2030 2020 Decadal PTA detection J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 2

Advanced LIGO • Advanced LIGO construction completed on-time & on-budget • Hanford & Livingston handed over to LIGO Operations • a. LIGO O 1 starts 15 September with 3 -3. 5 x LIGO sensitivity ~10 x sensitivity ~103 x rate Credit: LIGO Lab J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 3

Milli-second Pulsars • GWs at the Earth cause correlation between arrival times of radio waves from MPSs. • SMBH-SMBH • Primordial, Cosmic strings, … J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 4

Pulsar Timing Arrays • Currently: ~50 MSPs (IPTA) with 10 -100 ns timing residuals • Detection within current decade plausible J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 5

J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 6

e. LISA Science J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 7

The e. LISA Mission International contribution ; -) J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 8

L 3 Schedule and Activities • Pre-L 3 selection: e. LISA 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 Friday • Phase A start (mission concept selection): 2018 • Payload EM: 2019 -2024 • Start of phase B 1: 2022 J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 9

LISA Pathfinder • • Technology goal: • Sa 1/2 <3× 10– 14 m/s 2 Hz 1/2 • Soms 1/2 < 9× 10– 12 m/Hz 1/2 • Model validation LISA Technology Package (ESA) • Two Gravitational Reference Sensors • Local laser interferometers • • LISA Tech. Package TM-to-TM + TM-to-S/C + … • Cold gas propulsion (GAIA) • Drag-free control logic Space Technology 7 (NASA) • Colloid thrusters • Drag-free Control logic J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 10

Acceleration Noise Requirement GP-B* GOCE J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 11

Status of Pathfinder • • Excellent progress towards launch • 5 June: Payload/spacecraft integration • 30 June: Acoustic test • 10 August: Flight Acceptance Review • 19 August: Ready to ship to Kourou Extensive ground operations tests J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 12

J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 13

LISA Pathfinder Launch 5 th Vega launch, 23 June Sentinel-2 a • 30 Sept: LPF ready for launch • Arianespace requires four months between Vega launches • Mid/late-Oct: earliest possible launch • Mid-Nov: likeliest launch date J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 14

Pathfinder Flight Operations Cruise: 60 days Commissioning: 14 days LTP Science: 90 days DRS Operations: 90 days J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 15

U. S. Technology Efforts • Telescope (NASA GSFC, J Livas) • • Prototype off-axis telescope to verify scattered light models Laser system (NASA GSFC, J Camp) • 2 W ECL in MOPA configuration • Colloidal thrusters (JPL, J Zeimer) • Phasemeter (JPL, W. Klipstein) • Novel optical bench (UF, G Mueller) • GRS technologies (UF, J Conklin) • • Off-axis telescope spacer Extended cavity laser Torsion pendulum facility: < 10– 12 m/s 2 Hz 1/2 AI GW observatory technology (Stanford, J Hogan, M Kasavich) J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago UF torsion pendulum 16

GRACE Follow-on • Joint NASA-DLR Earth geodesy mission • Launch in 2017 • First satellite-to-satellite laser interferometer demonstration • Borrows tech developed for LISA GRACE Follow-on Laser Ranging Instrument J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 17

GWSIG Activities • Neil Cornish (chair), John Conklin (vice-chair) • Events (in addition to weekly telecons): • • GWSIG splinter meeting @ April APS, Baltimore 11 April 2015 • Panel discussion @ Special HEAD meeting, Chicago 1 July 2015 • Joint-PAG session + GW booth @ IAU General Assembly, Honolulu 7 August 2015 • Joint-PAG virtual town hall August 2015 • GWSIG splinter meeting @ AAS meeting, Kissimmee January 2016 • 11 th LISA Symposium, Zurich September 2016 GWSIG Email list Google: nasa gwsag J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 18

Hertz Charge to PAGs • Gravitational Wave Surveyor (LISA) excluded from list of big 4 • 2010 Decadal: LISA is #2 priority large mission after WFIRST • WG community general consensus: • L 3 is an important opportunity • Viable NASA-ESA partnership on L 3 requires • Strong recommendation by 2020 decadal committee • Technology development (now) in cooperation with Europe • Gravitational Wave Surveyor study to inform the 2020 decadal: • Technology assessment: U. S. strengths + new developments • Range of options for U. S. participation and contributions • Update 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 J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 19

State of GW during 2020 Decadal a. LIGO/VIRG 0 detection Selected for L 3 (late 2013) BICEP 2 (2014) 2010 e. LISA Launch (2034) 2020 LISA ranked 2 nd after WFIRST in NWNH LISA Pathfinder (Oct 2015) 2030 2020 Decadal PTA detection J. W. Conklin, Special HEAD Meeting, 30 June 2015, Chicago 20