1 MEASUREMENTS OF THE IMPRINT OF INFLATIONARY GRAVITY WAVES ON THE COSMIC MICROWAVE BACKGROUND RADIATION ARE CURRENTLY LIMITED BY UNCERTAINTY IN THE PROPERTIES OF POLARIZED GALACTIC DUST. A BALLOON-BORNE PLATFORM PROBING FREQUENCY BANDS THAT ARE NOT ACCESSIBLE FROM THE GROUND IS UNIQUELY SUITED TO DRASTICALLY REDUCE THIS UNCERTAINTY. WE PROPOSE EBEX-IDS, A LONG-DURATION BALLOON-BORNE EXPERIMENT THAT WILL MEASURE THE POLARIZATION OF GALACTIC DUST AT 360~GHZ WITH 36 TIMES LOWER POWER SPECTRUM NOISE, COMPARED TO THE PLANCK SATELLITE. WITH 20,562 DETECTORS, SPREAD OVER 7 FREQUENCY BANDS BETWEEN 150 AND 360~GHZ, INCLUDING BANDS AT 280, 320, AND 360~GHZ, EBEX-IDS WILL DETERMINE THE SPECTRAL INDEX OF POLARIZED DUST EMISSION AND ITS B-MODE POWER SPECTRUM AT 150~GHZ WITH AN UNPRECEDENTED ACCURACY OF 0.04% AND SIGNAL-TO-NOISE RATIO (SNR) OF 42, RESPECTIVELY. THE MULTITUDE OF INDEPENDENT BANDS WILL PRECISELY DETERMINE THE SHAPE OF THE DUST SPECTRAL ENERGY DISTRIBUTION AT THE FREQUENCY BANDS THAT ARE MOST RELEVANT FOR THE EXTRACTION OF THE INFLATIONARY SIGNAL. BY COMBINING OBSERVATIONS AND SHARING DATA WITH THE GROUND-BASED BICEP/KECK ARRAY AND POLARBEAR/SIMONS ARRAY INSTRUMENTS THE THREE EXPERIMENTS WILL GIVE A MAP DEPTH IN THE BICEP2 REGION OF LESS THAN 1 MICROK ARCMIN, THE DEEPEST MAP YET PRODUCED COMPARED TO ANY OTHER SKY REGION. WITH THIS DEPTH AND USING THE THE EBEX-IDS DATA TO PROVIDE THE CRUCIAL LEVERAGE ON THE PROPERTIES OF DUST EMISSION, THE COMBINED DATA WILL PLACE A 2 SIGMA UPPER LIMIT OF R Other Administrative Action $0 2/21/18 Not listed MEASUREMENTS OF THE IMPRINT OF INFLATIONARY GRAVITY WAVES ON THE COSMIC MICROWAVE BACKGROUND RADIATION ARE CURRENTLY LIMITED BY UNCERTAINTY IN THE PROPERTIES OF POLARIZED GALACTIC DUST. A BALLOON-BORNE PLATFORM PROBING FREQUENCY BANDS THAT ARE NOT ACCESSIBLE FROM THE GROUND IS UNIQUELY SUITED TO DRASTICALLY REDUCE THIS UNCERTAINTY. WE PROPOSE EBEX-IDS A LONG-DURATION BALLOON-BORNE EXPERIMENT THAT WILL MEASURE THE POLARIZATION OF GALACTIC DUST AT 360~GHZ WITH 36 TIMES LOWER POWER SPECTRUM NOISE COMPARED TO THE PLANCK SATELLITE. WITH 20 562 DETECTORS SPREAD OVER 7 FREQUENCY BANDS BETWEEN 150 AND 360~GHZ INCLUDING BANDS AT 280 320 AND 360~GHZ EBEX-IDS WILL DETERMINE THE SPECTRAL INDEX OF POLARIZED DUST EMISSION AND ITS B-MODE POWER SPECTRUM AT 150~GHZ WITH AN UNPRECEDENTED ACCURACY OF 0.04% AND SIGNAL-TO-NOISE RATIO (SNR) OF 42 RESPECTIVELY. THE MULTITUDE OF INDEPENDENT BANDS WILL PRECISELY DETERMINE THE SHAPE OF THE DUST SPECTRAL ENERGY DISTRIBUTION AT THE FREQUENCY BANDS THAT ARE MOST RELEVANT FOR THE EXTRACTION OF THE INFLATIONARY SIGNAL. BY COMBINING OBSERVATIONS AND SHARING DATA WITH THE GROUND-BASED BICEP/KECK ARRAY AND POLARBEAR/SIMONS ARRAY INSTRUMENTS THE THREE EXPERIMENTS WILL GIVE A MAP DEPTH IN THE BICEP2 REGION OF LESS THAN 1 MICROK ARCMIN THE DEEPEST MAP YET PRODUCED COMPARED TO ANY OTHER SKY REGION. WITH THIS DEPTH AND USING THE THE EBEX-IDS DATA TO PROVIDE THE CRUCIAL LEVERAGE ON THE PROPERTIES OF DUST EMISSION THE COMBINED DATA WILL PLACE A 2 SIGMA UPPER LIMIT OF R $0 2/21/18 Not listed MEASUREMENTS OF THE IMPRINT OF INFLATIONARY GRAVITY WAVES ON THE COSMIC MICROWAVE BACKGROUND RADIATION ARE CURRENTLY LIMITED BY UNCERTAINTY IN THE PROPERTIES OF POLARIZED GALACTIC DUST. A BALLOON-BORNE PLATFORM PROBING FREQUENCY BANDS THAT ARE NOT ACCESSIBLE FROM THE GROUND IS UNIQUELY SUITED TO DRASTICALLY REDUCE THIS UNCERTAINTY. WE PROPOSE EBEX-IDS, A LONG-DURATION BALLOON-BORNE EXPERIMENT THAT WILL MEASURE THE POLARIZATION OF GALACTIC DUST AT 360~GHZ WITH 36 TIMES LOWER POWER SPECTRUM NOISE, COMPARED TO THE PLANCK SATELLITE. WITH 20,562 DETECTORS, SPREAD OVER 7 FREQUENCY BANDS BETWEEN 150 AND 360~GHZ, INCLUDING BANDS AT 280, 320, AND 360~GHZ, EBEX-IDS WILL DETERMINE THE SPECTRAL INDEX OF POLARIZED DUST EMISSION AND ITS B-MODE POWER SPECTRUM AT 150~GHZ WITH AN UNPRECEDENTED ACCURACY OF 0.04% AND SIGNAL-TO-NOISE RATIO (SNR) OF 42, RESPECTIVELY. THE MULTITUDE OF INDEPENDENT BANDS WILL PRECISELY DETERMINE THE SHAPE OF THE DUST SPECTRAL ENERGY DISTRIBUTION AT THE FREQUENCY BANDS THAT ARE MOST RELEVANT FOR THE EXTRACTION OF THE INFLATIONARY SIGNAL. BY COMBINING OBSERVATIONS AND SHARING DATA WITH THE GROUND-BASED BICEP/KECK ARRAY AND POLARBEAR/SIMONS ARRAY INSTRUMENTS THE THREE EXPERIMENTS WILL GIVE A MAP DEPTH IN THE BICEP2 REGION OF LESS THAN 1 MICROK ARCMIN, THE DEEPEST MAP YET PRODUCED COMPARED TO ANY OTHER SKY REGION. WITH THIS DEPTH AND USING THE THE EBEX-IDS DATA TO PROVIDE THE CRUCIAL LEVERAGE ON THE PROPERTIES OF DUST EMISSION, THE COMBINED DATA WILL PLACE A 2 SIGMA UPPER LIMIT OF R Not listed $300.0k 3/15/17 Not listed MEASUREMENTS OF THE IMPRINT OF INFLATIONARY GRAVITY WAVES ON THE COSMIC MICROWAVE BACKGROUND RADIATION ARE CURRENTLY LIMITED BY UNCERTAINTY IN THE PROPERTIES OF POLARIZED GALACTIC DUST. A BALLOON-BORNE PLATFORM PROBING FREQUENCY BANDS THAT ARE NOT ACCESSIBLE FROM THE GROUND IS UNIQUELY SUITED TO DRASTICALLY REDUCE THIS UNCERTAINTY. WE PROPOSE EBEX-IDS A LONG-DURATION BALLOON-BORNE EXPERIMENT THAT WILL MEASURE THE POLARIZATION OF GALACTIC DUST AT 360~GHZ WITH 36 TIMES LOWER POWER SPECTRUM NOISE COMPARED TO THE PLANCK SATELLITE. WITH 20 562 DETECTORS SPREAD OVER 7 FREQUENCY BANDS BETWEEN 150 AND 360~GHZ INCLUDING BANDS AT 280 320 AND 360~GHZ EBEX-IDS WILL DETERMINE THE SPECTRAL INDEX OF POLARIZED DUST EMISSION AND ITS B-MODE POWER SPECTRUM AT 150~GHZ WITH AN UNPRECEDENTED ACCURACY OF 0.04% AND SIGNAL-TO-NOISE RATIO (SNR) OF 42 RESPECTIVELY. THE MULTITUDE OF INDEPENDENT BANDS WILL PRECISELY DETERMINE THE SHAPE OF THE DUST SPECTRAL ENERGY DISTRIBUTION AT THE FREQUENCY BANDS THAT ARE MOST RELEVANT FOR THE EXTRACTION OF THE INFLATIONARY SIGNAL. BY COMBINING OBSERVATIONS AND SHARING DATA WITH THE GROUND-BASED BICEP/KECK ARRAY AND POLARBEAR/SIMONS ARRAY INSTRUMENTS THE THREE EXPERIMENTS WILL GIVE A MAP DEPTH IN THE BICEP2 REGION OF LESS THAN 1 MICROK ARCMIN THE DEEPEST MAP YET PRODUCED COMPARED TO ANY OTHER SKY REGION. WITH THIS DEPTH AND USING THE THE EBEX-IDS DATA TO PROVIDE THE CRUCIAL LEVERAGE ON THE PROPERTIES OF DUST EMISSION THE COMBINED DATA WILL PLACE A 2 SIGMA UPPER LIMIT OF R $300.0k 3/15/17