BSC Football: The Swenson Era

A recollection of Bridgewater State College Coach Edward Swenson’s efforts to bring varsity-level football back into a Massachusetts state college and the stories of the trials and tribulations of his first eight years as head coach. The book is a Bridgewater State University Football Alumni project inspired by many of Coach Swenson’s former players, commemorating the coach and several of their former teammates

Oral History Interview with Bill Clifford, Mike Hughes, Jim Tartari, and Charlie Worden

Length of recording: 1:13:14 Interviewed by Ellen Dubinsky at the John Joseph Moakley Center for Technological Applications, Bridgewater State University, Bridgewater, Massachusetts on Wednesday, May 30, 2012. The interview covers the early years of the varsity football program at Bridgewater State College in the mid- to late-1960s. The subjects detail their experiences as football players in those years, reminiscing about many of their fellow athletes, specific games played, their training and practice experiences, and the reception of the Bridgewater campus community to the football program. The interview includes discussion about the team’s first coach Edward Swenson and his successor Peter Mazzaferro. The subjects also relate some of their memorable experiences as Bridgewater State College students in the mid- to late-1960s, including a growing awareness of the Vietnam War and social movements of the time.https://vc.bridgew.edu/oralhist/1001/thumbnail.jp

Oral History Interview with Paul Callahan, Betty Sawin Callahan, David Fee, David Morwick, and Jim Tartari

Length of recording: 1:11:53 Interviewed by Ellen Dubinsky at the John Joseph Moakley Center for Technological Applications, Bridgewater State University, Bridgewater, Massachusetts on Friday, October 21, 2011. The interview covers the beginnings of the varsity football program at Bridgewater State College in the fall of 1960 under the direction of Coach Edward Swenson. The subjects detail their experiences as football players in those first four seasons, reminiscing about many of their fellow athletes, specific games played, their training and practice experiences, the cheerleading squad, and the reception of the Bridgewater campus community to the football program. The subjects also relate some of their memorable experiences as Bridgewater State College students in the early 1960s.https://vc.bridgew.edu/oralhist/1000/thumbnail.jp

Concept design of low frequency telescope for CMB B-mode polarization satellite LiteBIRD

LiteBIRD has been selected as JAXA’s strategic large mission in the 2020s, to observe the cosmic microwave background (CMB) B-mode polarization over the full sky at large angular scales. The challenges of LiteBIRD are the wide field-of-view (FoV) and broadband capabilities of millimeter-wave polarization measurements, which are derived from the system requirements. The possible paths of stray light increase with a wider FoV and the far sidelobe knowledge of -56 dB is a challenging optical requirement. A crossed-Dragone configuration was chosen for the low frequency telescope (LFT : 34–161 GHz), one of LiteBIRD’s onboard telescopes. It has a wide field-of-view (18° x 9°) with an aperture of 400 mm in diameter, corresponding to an angular resolution of about 30 arcminutes around 100 GHz. The focal ratio f/3.0 and the crossing angle of the optical axes of 90◦ are chosen after an extensive study of the stray light. The primary and secondary reflectors have rectangular shapes with serrations to reduce the diffraction pattern from the edges of the mirrors. The reflectors and structure are made of aluminum to proportionally contract from warm down to the operating temperature at 5 K. A 1/4 scaled model of the LFT has been developed to validate the wide field-of-view design and to demonstrate the reduced far sidelobes. A polarization modulation unit (PMU), realized with a half-wave plate (HWP) is placed in front of the aperture stop, the entrance pupil of this system. A large focal plane with approximately 1000 AlMn TES detectors and frequency multiplexing SQUID amplifiers is cooled to 100 mK. The lens and sinuous antennas have broadband capability. Performance specifications of the LFT and an outline of the proposed verification plan are presented

LiteBIRD satellite: JAXA's new strategic L-class mission for all-sky surveys of cosmic microwave background polarization

LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation from cosmic background Radiation Detection, is a space mission for primordial cosmology and fundamental physics. JAXA selected LiteBIRD in May 2019 as a strategic large-class (L-class) mission, with its expected launch in the late 2020s using JAXA's H3 rocket. LiteBIRD plans to map the cosmic microwave background (CMB) polarization over the full sky with unprecedented precision. Its main scientific objective is to carry out a definitive search for the signal from cosmic inflation, either making a discovery or ruling out well-motivated inflationary models. The measurements of LiteBIRD will also provide us with an insight into the quantum nature of gravity and other new physics beyond the standard models of particle physics and cosmology. To this end, LiteBIRD will perform full-sky surveys for three years at the Sun-Earth Lagrangian point L2 for 15 frequency bands between 34 and 448 GHz with three telescopes, to achieve a total sensitivity of 2.16 μK-arcmin with a typical angular resolution of 0.5° at 100 GHz. We provide an overview of the LiteBIRD project, including scientific objectives, mission requirements, top-level system requirements, operation concept, and expected scientific outcomes

Overview of the medium and high frequency telescopes of the LiteBIRD space mission

LiteBIRD is a JAXA-led Strategic Large-Class mission designed to search for the existence of the primordial gravitational waves produced during the inflationary phase of the Universe, through the measurements of their imprint onto the polarization of the cosmic microwave background (CMB). These measurements, requiring unprecedented sensitivity, will be performed over the full sky, at large angular scales, and over 15 frequency bands from 34 GHz to 448 GHz. The LiteBIRD instruments consist of three telescopes, namely the Low-, Medium-and High-Frequency Telescope (respectively LFT, MFT and HFT). We present in this paper an overview of the design of the Medium-Frequency Telescope (89{224 GHz) and the High-Frequency Telescope (166{448 GHz), the so-called MHFT, under European responsibility, which are two cryogenic refractive telescopes cooled down to 5 K. They include a continuous rotating half-wave plate as the first optical element, two high-density polyethylene (HDPE) lenses and more than three thousand transition-edge sensor (TES) detectors cooled to 100 mK. We provide an overview of the concept design and the remaining specific challenges that we have to face in order to achieve the scientific goals of LiteBIRD