B01-Ⅱ
B01-Ⅱ:Development of X-ray imaging polarimeter for exploring magnetic structure of neutron stars
Neutron stars(NSs) are the densest matter in the universe. Although NSs possess strong magnetic field (>1013G), its origin and detailed structure are unsolved. Imaging of polarization vector of X-ray pulsars would explore the internal structure of NSs.
The aim of our research is to develop the X-ray imaging polarimeter with high time resolution utilizing good energy resolution and spatial resolution.
Direct measurement of the charge cloud shape produced inside a detector is the key. A novel multi-collimator is introduced in order to examine the charge cloud measurement up to 20keV. We will perform experiments to measure the charge cloud for various energies of polarized X-rays. The charge cloud would be elongated along the track of a photoelectron path for a polarized photon.
Member
Principal Investigator：Junko S. Hiraga
University of Tokyo
Research Center for the Early Universe(RESCEU)
Graduate School of Science
Assistant professor
Publications
- K. Makishima, T. Enoto, J.S.Hiraga, T. Nakano, K. Nakazawa, S. Sakuai, M.Sasano, and H.Murakami, Physical Review Letters, Volume 112, Issue 17, id.171102, (2014) “Possible Evidence for Free Precession of a Strongly Magnetized Neutron Star in the Magnetar 4U 0142+61”
- J. S. Hiraga, S. Nakamura, Y. Uchida, M. Kikuchi, S. Kurata , Y. Ozaki, S. Kurata,S. Kamada, T. Takashima, Y. Uchihori, H. Kitamura and H. Tawara Nucl. Instrum. and Meth., A573, 236-239, (2007), “A novel multi-collimator using BP-1 glass and application for X-ray CCDs”