Magnetic Measurement Results of the LCLS Undulator Quadrupoles

This note details the magnetic measurements and the magnetic center fiducializations that were performed on all of the thirty-six LCLS undulator quadrupoles. Temperature rise, standardization reproducibility, vacuum chamber effects and magnetic center reproducibility measurements are also presented. The Linac Coherent Light Source (LCLS) undulator beam line has 33 girders, each with a LCLS undulator quadrupole which focuses and steers the beam through the beam line. Each quadrupole has main quadrupole coils, as well as separate horizontal and vertical trim coils. Thirty-six quadrupoles, thirty-three installed and three spares were, manufactured for the LCLS undulator system and all were measured to confirm that they met requirement specifications for integrated gradient, harmonics and for magnetic center shifts after current changes. The horizontal and vertical dipole trims of each quadrupole were similarly characterized. Each quadrupole was also fiducialized to its magnetic center. All characterizing measurements on the undulator quads were performed with their mirror plates on and after a standardization of three cycles from -6 to +6 to -6 amps. Since the undulator quadrupoles could be used as a focusing or defocusing magnet depending on their location, all quadrupoles were characterized as focusing and as defocusing quadrupoles. A subset of the undulator quadrupoles were used to verify that the undulator quadrupole design met specifications for temperature rise, standardization reproducibility and magnetic center reproducibility after splitting. The effects of the mirror plates on the undulator quadrupoles were also measured

Magnetic Measurement Results of the LCLS Undulator Quadrupoles

This note details the magnetic measurements and the magnetic center fiducializations that were performed on all of the thirty-six LCLS undulator quadrupoles. Temperature rise, standardization reproducibility, vacuum chamber effects and magnetic center reproducibility measurements are also presented. The Linac Coherent Light Source (LCLS) undulator beam line has 33 girders, each with a LCLS undulator quadrupole which focuses and steers the beam through the beam line. Each quadrupole has main quadrupole coils, as well as separate horizontal and vertical trim coils. Thirty-six quadrupoles, thirty-three installed and three spares were, manufactured for the LCLS undulator system and all were measured to confirm that they met requirement specifications for integrated gradient, harmonics and for magnetic center shifts after current changes. The horizontal and vertical dipole trims of each quadrupole were similarly characterized. Each quadrupole was also fiducialized to its magnetic center. All characterizing measurements on the undulator quads were performed with their mirror plates on and after a standardization of three cycles from -6 to +6 to -6 amps. Since the undulator quadrupoles could be used as a focusing or defocusing magnet depending on their location, all quadrupoles were characterized as focusing and as defocusing quadrupoles. A subset of the undulator quadrupoles were used to verify that the undulator quadrupole design met specifications for temperature rise, standardization reproducibility and magnetic center reproducibility after splitting. The effects of the mirror plates on the undulator quadrupoles were also measured

Abstract PO-251: Examining facilitators and barriers to cancer screening among Black firefighters in South Florida

Abstract Purpose: Epidemiologic studies of cancer among U.S. firefighters suggest a disproportionate burden of select cancer types including respiratory, gastrointestinal, skin, and kidney when compared to the general population. Although routine colorectal and whole-body skin cancer screening is widely recommended, screening rates among firefighters remain low. The National Fire Protection Association estimates a 1.1 million firefighter workforce, most of whom are Caucasian male, however, sub-groups of women, Hispanic, sexual minority, and Black firefighters are growing. In the present study we describe facilitators and barriers to cancer screening among Black firefighters. Method: A semi-structured interview script was used to conduct five focus group sessions of 45 to 60-minute duration with a total of 22 Black firefighters in South Florida between December 2019 and June 2020. A 20-item demographic survey was administered prior to the start of the interview. Data analysis was conducted using a grounded theory approach and NVIVO 12 software. Qualitative data was analyzed for themes and patterns. Results: Among participating Black firefighters, 90.9% were male, 4.6% Hispanic, 77.3% married, 68.1% with college/master’s educational attainment, 72.7% with private health insurance, 72.7% had a personal doctor, and a group mean age was 44 years (SD ± 8.7 years). Across all focus group sessions, the following three major themes emerged as facilitators and barriers to cancer screening: 1) societal culture of machismo and familial culture; 2) cancer education and cancer awareness; and 3) individual faith. Black firefighters describe culture as influencing health decisions and behaviors throughout their lives, including food choices, receiving a health screening, or visiting a doctor. A second prevalent theme focused on education and cancer awareness; specifically, Black firefighters did not feel comfortable with doctors, particularly because they were Black and firefighters. Many felt that their doctors are not as aware of racial health differences as they should be, and they had to bring information to their doctors about firefighters’ unique job exposures. Lastly, a third theme describing individual faith influencing cancer screening practices frequently emerged. Many participants reported faith as being very important to them, however, they would not let religious beliefs prevent them from seeking medical interventions when needed. Conclusion: Black societal culture of machismo, cancer education and awareness, and individual faith were identified as facilitators and barriers of cancer screening among Black firefighters in South Florida. Strategies to improve cancer screening and prevention for Black firefighters should consider these factors in the design of workplace cancer interventions for this unique minority occupational subgroup. Citation Format: Kemi Ogunsina, Natasha Solle, Lauren A. Murphy, Debi Brannan, Keith Bell, William McAlister, Erin Kobetz, Alberto Caban- Martinez. Examining facilitators and barriers to cancer screening among Black firefighters in South Florida [abstract]. In: Proceedings of the AACR Virtual Conference: Thirteenth AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2020 Oct 2-4. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2020;29(12 Suppl):Abstract nr PO-251

Reducing wildfire risk to urban developments: Simulation of cost-effective fuel treatment solutions in south eastern Australia

Wildfires can result in significant economic and social losses. Prescribed fire is commonly applied to reduce fuel loads and thereby decrease future fire risk to life and property. Fuel treatments can occur in the landscape or adjacent to houses. Location of the prescribed burns can significantly alter the risk of house loss. Furthermore the cost of treating fuels in the landscape is far cheaper than treating fuels adjacent to the houses. Here we develop a Bayesian Network to examine the relative reduction in risk that can be achieved by prescribed burning in the landscape compared with a 500 m interface zone adjacent to houses. We then compare costs of management treatments to determine the most cost-effective method of reducing risk to houses. Burning in the interface zone resulted in the greatest reduction in risk of fires reaching the houses and the intensity of these fires. Fuel treatment in the interface zone allows for a direct transfer of benefits from the fuel treatment. Costs of treating fuels in the interface were significantly higher on a per hectare basis, but the extent of area requiring treatment was considerably lower. Results of this study demonstrate that treatment of fuels at the interface is not only the best means of reducing risk, it is also the most cost-effective

Getting a Technology-Based Diabetes Intervention Ready for Prime Time: a Review of Usability Testing Studies

Consumer health technologies can educate patients about diabetes and support their self-management, yet usability evidence is rarely published even though it determines patient engagement, optimal benefit of any intervention, and an understanding of generalizability. Therefore, we conducted a narrative review of peer-reviewed articles published from 2009–2013 that tested the usability of a web- or mobile-delivered system/application designed to educate and support patients with diabetes. Overall, the 23 papers included in our review used mixed (n=11), descriptive quantitative (n=9), and qualitative methods (n=3) to assess usability, such as documenting which features performed as intended and how patients rated their experiences. More sophisticated usability evaluations combined several complementary approaches to elucidate more aspects of functionality. Future work pertaining to the design and evaluation of technology-delivered diabetes education/support interventions should aim to standardize the usability testing processes, and publish usability findings to inform interpretation of why an intervention succeeded or failed, and for whom