Measurement and Compensation of Horizontal Crabbing at the Cornell Electron Storage Ring Test Accelerator

In storage rings, horizontal dispersion in the rf cavities introduces horizontal-longitudinal (xz) coupling, contributing to beam tilt in the xz plane. This coupling can be characterized by a "crabbing" dispersion term {\zeta}a that appears in the normal mode decomposition of the 1-turn transfer matrix. {\zeta}a is proportional to the rf cavity voltage and the horizontal dispersion in the cavity. We report experiments at the Cornell Electron Storage Ring Test Accelerator (CesrTA) where xz coupling was explored using three lattices with distinct crabbing properties. We characterize the xz coupling for each case by measuring the horizontal projection of the beam with a beam size monitor. The three lattice configurations correspond to a) 16 mrad xz tilt at the beam size monitor source point, b) compensation of the {\zeta}a introduced by one of two pairs of RF cavities with the second, and c) zero dispersion in RF cavities, eliminating {\zeta}a entirely. Additionally, intrabeam scattering (IBS) is evident in our measurements of beam size vs. rf voltage.Comment: 5 figures, 10 page

Occurrence of the Old World bug Megacopta cribraria (Fabricius) (Heteroptera: Plataspidae) in Georgia: a serious home invader and potential legume pest

Specimens of Megacopta cribraria (Fabricius) were collected in northern Georgia in late October 2009, where they were invading homes in large numbers. This is the first known occurrence of this species and the family Plataspidae in the New World. Megacopta cribraria was previously known from Asia and Australia. A key is provided to separate Plataspidae from other families of Pentatomoidea in America North of Mexico. A diagnosis and figures are provided to facilitate recognition of M. cribraria. Reported host plants and other aspects of the biology of this species are reviewed. Megacopta cribraria is considered a pest of numerous legumes in Asia, has the potential to provide biological control of kudzu, Pueraria montana var. lobata (Willd.) Ohwi, (Fabaceae) and likely will continue to be a household pest in the vicinity of kudzu fields as well as become a pest of North American legume crops

Accelerator Design for the CHESS-U Upgrade

During the summer and fall of 2018 the Cornell High Energy Synchrotron Source (CHESS) is undergoing an upgrade to increase high-energy flux for x-ray users. The upgrade requires replacing one-sixth of the Cornell Electron Storage Ring (CESR), inverting the polarity of half of the CHESS beam lines, and switching to single-beam on-axis operation. The new sextant is comprised of six double-bend achromats (DBAs) with combined-function dipole-quadrupoles. Although the DBA design is widely utilized and well understood, the constraints for the CESR modifications make the CHESS-U lattice unique. This paper describes the design objectives, constraints, and implementation for the CESR accelerator upgrade for CHESS-U

Shifting Organizational Cultures: Developing Leaders in Humanistic Interprofessional Education

Organizational cultures significantly influence faculty and clinician well-being, trainees’ professional identity formation, and the care of patients and families. The ability of interprofessional healthcare teams to work collaboratively is important for safe, high quality, relationship-centered care. A multi-site project, Faculty Development for the Interprofessional Teaching of Humanism,* was initiated to create a national curriculum in humanism and professionalism designed to train interprofessional education (IPE) faculty leaders. Boston Children’s Hospital / Harvard Medical School (BCH/HMS) is the first pediatric site selected to design and implement this curriculum. Our objectives were to: 1) develop a national curriculum in humanism and professionalism for IPE faculty leaders; 2) adapt the curriculum for pediatrics; and 3) create and sustain a faculty fellowship for IPE leaders at BCH/HMS that promotes humanistic values in organizational culture and learning and care environments. We designed and implemented the curriculum at nine national sites. Topics focus on collaboration, communication, and relationships and include: highly functioning teams; advanced team formation; patients’ perspectives; empathy; well-being, resilience, renewal; diversity & inclusion; appreciative inquiry; values; IPE and others. To achieve sustainability at BCH/HMS, we created a unique Faculty Fellowship for Leaders in Humanistic Interprofessional Education. To increase impact, we recruited co-sponsors from departments across BCH. Fellows participate in 1½-hour, twice-monthly small-group sessions for 8 months and design and implement a group project. Twenty-one faculty applied. The first cohort included 11 faculty representing medicine, social work, nursing, and psychology. The Faculty Fellowship provides opportunities for IPE faculty leaders to enhance teaching skills, collaboration, relationships, reflective capacities, and role modeling in humanism and professionalism, and to work together to foster humanistic values within organizational culture. *Supported by a multi-institutional grant from the Josiah Macy, Jr. Foundation (Dr. Branch as national PI; Dr. Rider as site PI) 

Training interprofessional faculty in humanism and professionalism: a qualitative analysis of what is most important

Introduction: The capacity of healthcare professionals to work collaboratively influences faculty and trainees’ professional identity formation, well-being, and care quality. Part of a multi-institutional project*, we created the Faculty Fellowship for Leaders in Humanistic Interprofessional Education at Boston Children’s Hospital/ Harvard Medical School. We aimed to foster trusting relationships, reflective abilities, collaboration skills, and work together to promote humanistic values within learning environments. Objective: To examine the impact of the faculty fellowship from participants’ reports of “the most important thing learned”. Methods: We studied participants’ reflections after each of 16 1½ hour fellowship sessions. Curriculum content included: highly functioning teams, advanced team formation, diversity/inclusion, values, wellbeing/renewal/burnout, appreciative inquiry, narrative reflection, and others. Responses to “What was the most important thing you learned?” were analyzed qualitatively using a positivistic deductive approach. Results: Participants completed 136 reflections over 16 sessions–77% response rate (136/176). Cohort was 91% female; mean age 52.6 (range 32-65); mean years since completion of highest degree 21.4; 64% held doctorates, 36% master’s degrees. 46% were physicians, 27% nurses, 18% social workers, 9% psychologists. 27% participated previously in a learning experience focusing on interprofessional education, collaboration or practice. Most important learning included: Relational capacities/ Use of self in relationships 96/131 (73%); Attention to values 46/131 (35%); Reflection/ Self-awareness 44/131 (34%); Fostering humanistic learning environments 21/131 (16%). Discussion: Results revealed the importance of enhancing relational capacities and use of self in relationships including handling emotions; attention to values; reflection/self-awareness and recognition of assumptions; and fostering humanistic learning environments. These topics should receive more emphasis in interprofessional faculty development programs and may help identify teaching priorities. *Supported in part by a multi-institutional grant from the Josiah Macy, Jr. Foundation (Dr. Branch as PI; Dr. Rider as site PI)

The BetaCage, an ultra-sensitive screener for surface contamination

Material screening for identifying low-energy electron emitters and alpha-decaying isotopes is now a prerequisite for rare-event searches (e.g., dark-matter direct detection and neutrinoless double-beta decay) for which surface radiocontamination has become an increasingly important background. The BetaCage, a gaseous neon time-projection chamber, is a proposed ultra-sensitive (and nondestructive) screener for alpha- and beta-emitting surface contaminants to which existing screening facilities are insufficiently sensitive. Sensitivity goals are 0.1 betas per keV-m$^2$-day and 0.1 alphas per m$^2$-day, with the former limited by Compton scattering of photons in the screening samples and (thanks to tracking) the latter expected to be signal-limited; radioassays and simulations indicate backgrounds from detector materials and radon daughters should be subdominant. We report on details of the background simulations and detector design that provide the discrimination, shielding, and radiopurity necessary to reach our sensitivity goals for a chamber with a 95$\times$95 cm$^2$ sample area positioned below a 40 cm drift region and monitored by crisscrossed anode and cathode planes consisting of 151 wires each.Comment: 5 pages, 3 figures, Proceedings of Low Radioactivity Techniques (LRT) 2013, Gran Sasso, Italy, April 10-12, 201

Large droplet impact on water layers

The impact of large droplets onto an otherwise undisturbed layer of water is considered. The work, which is motivated primarily with regard to aircraft icing, is to try and help understand the role of splashing on the formation of ice on a wing, in particular for large droplets where splash appears, to have a significant effect. Analytical and numerical approaches are used to investigate a single droplet impact onto a water layer. The flow for small times after impact is determined analytically, for both direct and oblique impacts. The impact is also examined numerically using the volume of fluid (VOF) method. At small times there are promising comparisons between the numerical results, the analytical solution and experimental work capturing the ejector sheet. At larger times there is qualitative agreement with experiments and related simulations. Various cases are considered, varying the droplet size to layer depth ratio, including surface roughness, droplet distortion and air effects. The amount of fluid splashed by such an impact is examined and is found to increase with droplet size and to be significantly influenced by surface roughness. The makeup of the splash is also considered, tracking the incoming fluid, and the splash is found to consist mostly of fluid originating in the layer

The Partition Function of Multicomponent Log-Gases

We give an expression for the partition function of a one-dimensional log-gas comprised of particles of (possibly) different integer charge at inverse temperature {\beta} = 1 (restricted to the line in the presence of a neutralizing field) in terms of the Berezin integral of an associated non- homogeneous alternating tensor. This is the analog of the de Bruijn integral identities [3] (for {\beta} = 1 and {\beta} = 4) ensembles extended to multicomponent ensembles.Comment: 14 page