Center for Bright Beams Advisory Board Report
This report captures the progress and initiatives discussed at the Center for Bright Beams External Advisory Board meeting on May 31, 2023. It includes updates on knowledge transfer strategies, technology demonstrations, NSF site visit preparations, and general observations regarding CBB's research themes and climate. Feedback and suggestions are also highlighted.
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Presentation Transcript
Center for Bright Beams External Advisory Board Closeout Report May 31, 2023
Charge 1. At last year s meeting, you pointed out that our Strategic Plan for Knowledge Transfer was thin, and in response we have significantly developed our plans for the transfer of both knowledge and technology. In the technology domain, we have identified the specific technologies that we plan to transfer along with the process for doing so. We would like your feedback on this plan. 2. At last year s meeting, you embraced a CBB intention to demonstrate, experimentally, low emittance and 100pC bunch charge. Since then, we have identified beamlines where such a demonstration would be feasible. Our specific target was encapsulated in a Spring 2023 Deliverable "Identification of beamlines for a potential experimental demonstration of the simultaneous generation of low emittance and high bunch charge (~100 pC), using CBB low-MTE photocathodes and diagnostics, that when coupled with a bunch-compression beamline would produce beams with 5D normalized brightness I _ ^2 >10^15 Am-2 . We will present the candidate beamlines, and seek your advice on the value of going forward with the demonstration. 3. At this year s meeting, the talks you will hear will be draft presentations for our NSF Site Visit in July. This is a switch from the last two meetings, which focused on Strategic Plan updates, and we look forward to this opportunity to tell you more broadly about our accomplishments and plans. Please let us know how we can improve the quality of the presentations for NSF. CBB EAB meeting | Closeout 2 5/31/2023
Outline 1. General Comments and Observations 2. Beam Production (PHC) Theme 3. Beam Acceleration (SRF) Theme 4. Beam Dynamics and Control (BDC) Theme 5. Knowledge Transfer 6. Workforce Development 7. External Evaluation of CBB Climate 8. The Future 5/31/2023 CBB EAB meeting | Closeout 3
1. General Comments and Observations Once again very impressive progress across CBB s research themes The strength of CBB s interdisciplinary approach that brings together materials science and accelerator science expertise continues to power impressive progress across the Themes In fact this approach has enabled a new field of Accelerator Materials CBB s Team Science approach has really paid off! CBB has listened to our advice and taken action. The KT presentation was very impressive and demonstrates deep consideration. Climate survey confirms a very supportive and welcoming CBB climate. Very high impact is evident across research, workforce, knowledge transfer Focus on future post-CBB is appropriate; further exploration coupled with program engagement will be important 5/31/2023 CBB EAB meeting | Closeout 4
1. General Comments and Observations Suggestions for introductory talk Including overall productivity metrics: publications last year, multi-year publication record; students by year, etc, rather than waiting on that material presented in KT presentation Be clear on areas where CBB is leading, and where they are leveraging. General suggestions for Research Theme talks Take care to tune talks so that they are accessible to non-experts It can be helpful to include one or two slides in the beginning to convey the main messages. Most could benefit from putting the key figures in context. For example in Beam Production, what are emittance targets for the various applications and present state-of-the-art? 5 4/5/2022 CBB EAB meeting | Charge
2. Beam Production (PHC) Theme Zhu (Lead) + Carlsten + Gueye Comments: CBB has done a great job with this thrust and it is leading the field. The accomplishments are fantastic. For the future, theory guided experiments might be considered. There is other related photocathode funding, but the CBB work is driving what other funding is focusing on. CBB should be commended for this. Recommendations: Need to continue to explore new photocathode materials, including nanostructured and multilayered materials. Epitaxial growth should be emphasized as it is a new area. Understanding material surface states that affect materials performance is crucial. 5/31/2023 CBB EAB meeting | Closeout 6
2. Beam Production (PHC) Theme Zhu (Lead) + Carlsten + Gueye Suggestions for Presentation: The presentation went well. It contains lots of materials, and people can easily get lost (removing some of the contents might help). It can be helpful to include one or two slides in the beginning to convey the main messages. More details about the graphene/hBN deposition technique would be good. Adding references can save time. The introduction slides, such as slide 4 of Maxson s talk, are very useful. We expect that non-experts including NSF program managers will appreciate such an introduction. We also found it will be beneficial to include slides that describe the state-of-art technologies and CCB targets for different applications (similar to slide 5, <5meV of MTE). The suggestions described here are not just for PHC, might be for other scientific talks. 5/31/2023 CBB EAB meeting | Closeout 7
3. Beam Acceleration (SRF) Theme Henderson (Lead) + Huang + Gueye Comments SRF Strategic Plan is highly relevant and forward-looking CBB is leading in several important areas Overall Objectives and Deliverables are appropriately defined Remarkable progress is being made year-over-year, whether Nb3Sn growth and optimization, or NbZr Great to see the tools in place for rapid evaluation of other candidate superconducting materials critical to making progress in this very large search space Excellent progress toward demonstrating higher RF performance in proof-of- principle cavities Recommendations Suggestions for Presentation Well balanced talk overall (including experiment vs. theory) Highlight how to guide search for new material (Au, Hf ): make more explicit how it is not just a shot in the dark 5/31/2023 CBB EAB meeting | Closeout 8
4. Beam Dynamics and Control Theme Carlsten (Lead) + Huang + Reed Comments We commend the CBB for listening to our previous advice and acting on it. The three parts of BDC are better integrated than before, and both solely and together are compelling. The efforts to transition from basic research to actually deployed/transferred technology are really showing. We commend the BDC team on their successful completion of multiple goals, on schedule or even faster. Machine learning developments appear to be maturing, and the BDC plan for leveraging these results into more applications makes sense. 5/31/2023 CBB EAB meeting | Closeout 9
4. Beam Dynamics and Control Theme Carlsten (Lead) + Huang + Reed Recommendations Keep moving in the current directions, BDC is on track. Think clearly about the boundary between PHC and BDC (and it should remain soft and complementary) Think how CBB will back-fill lost photocathode fab capability at labs Remind people that CBB was finding real-world applications of ML before it was cool. To answer the question posed in Ritchie s introduction: This year s deliverable was was to determine the feasibility of such a test [low-emittance 100-pC demo]; we ve done that and now seek your advice on the value of pursuing it. The EAB believes the demo is very valuable and that the BDC approach is reasonable and worth pursuing. CBB EAB meeting | Closeout 10 5/31/2023
4. Beam Dynamics and Control Theme Carlsten (Lead) + Huang + Reed Suggestions for Presentation Be clear where CBB is leading in BDC areas and where CBB is contributing to larger activities. Present an early table on SOA beam parameters and BDC targets. 1e15 A/m^2 is a vague unit, please include a range of currents to make this metric more concrete. Slide 8 is really light and gives the impression of the plan being a little vague, while slide 9 is really dense and clarifies that the plan is actually quite detailed. It more than makes up for it, but in terms of telling a compelling story, maybe rethink how these two slides are constructed. Update with publications including publications in progress. The dates in brackets are nice, but if they were also coupled with references (perhaps using footnotes), it would better communicate the milestones. 5/31/2023 CBB EAB meeting | Closeout 11
5. Knowledge Transfer Hosler (Lead) + Reed Comments Fantastic adjustment from last years comments and the expansion of the deliverables into discreet, measurable tasks with a well-defined impact to the recipients. This is greatly appreciated and highlights the external reach of CBB exceptionally. The specificity of proposed collaborative R&D with target specifications matched to applications makes for a very clear story. Given the marked improvement, we encourage the team to further pursue means to transfer out the incredible knowledge developed at CBB. Performance numbers in terms of publications, service, conferences, workforce development, etc. are impressive. 5/31/2023 CBB EAB meeting | Closeout 12
5. Knowledge Transfer Hosler (Lead) + Reed Comments Fantastic adjustment, continue improvement along this trajectory Recommendations Expansion of the deliverables to include more on the accelerator optimization via ML/AI for industrial applications (reduced reliance on skilled operators) would be productive. Adding deliverables / participation with entrepreneurship and internship programs for students would contribute to workforce development and knowledge transfer to external partners and communities. Specifically, the path for distributing the ML TEM tuning code should be clarified. It s understood that there s some distance between research code and industry-deployable code, and that some effort will be required to adapt it to any given manufacturer/model. 13 5/31/2023 CBB EAB meeting | Closeout
5. Knowledge Transfer Hosler (Lead) + Reed Comments Fantastic adjustment, continue improvement along this trajectory Recommendations Expand on ML/AI applications as well as the path to export these learnings Focused development on internship and entrepreneurship opportunities Suggestions for Presentation It would be illustrative to the audience to briefly call out the number of presentations and papers presented by CBB throughout the life of the Center. Expansion of Machine Learning and AI applications would be beneficial as a result of current market trends. Lastly, please highlight the interdependence of the CHIPS Act regarding workforce development requirements and the contribution by CBB to that industry. 5/31/2023 CBB EAB meeting | Closeout 14
6. Workforce Development Gueye (Lead) + Zhu Comments Overall: very impressive presentation with many great programs that address all CBB employees (e.g., faculty, postdocs, grad students), including the pipeline from undergraduate students and diversifying the workforce. The new accelerator physics section with NSBP provides unique opportunity for further impacts. Including students feedback is commendable. Addressing career pathways throughout their training is sound. Recommendations Possible inclusion of regular visits to accelerator based facilities (national labs, industries and medical facilities, e.g., proton therapy centers and others) Discussions with DoE/NSF to leverage CBB unique multi-disciplinary training to train the next generation in accelerator materials as a stand-alone facility/center Suggestions for Presentation Adding data on undergraduate students Address the drop in marginalized students representation (e.g., loss of connection with Clark Atlanta) 5/31/2023 CBB EAB meeting | Closeout 15
7. External Evaluation of CBB Climate Reed (Lead) + Carlsten Comments External evaluation shows that things are generally going well, even managing to avoid a pandemic dip. Offline comments indicated that constructive criticism and suggestions not reflected in the presentation have been very useful. Recommendations Also describe the concerns and suggestions from the survey that were opportunities for improvement Suggestions for Presentation The slides lacked context. The title CBB External Evaluation immediately raises the question: Evaluation of what? The talk used a technical definition of climate that will not be familiar to the entire audience. A definition might help. 5/31/2023 CBB EAB meeting | Closeout 16
8. The Future Huang (Lead) + Hosler + Henderson Comments Convergence Research Legacy: Accelerator Materials Excellent plans for follow-up proposals have been identified Two proposals with xLight submitted to NSF technology directorate DOE renew with HBCU Recommendations Discuss with DOE BES on next steps. Be bold and forthright about legacy and impact of CBB outside the accelerator community. Suggestions for Presentation Emphasis CBB s legacy in the context of CHIPS Act. 5/31/2023 CBB EAB meeting | Closeout 17
CBB External Advisory Board Members Attending: Bruce Carlsten, Los Alamos National Laboratory Paul Gueye, Michigan State University Stuart Henderson, Thomas Jefferson National Accelerator Facility (chair) Eric Hosler, XLight Zhirong Huang, SLAC National Accelerator Laboratory Bryan Reed, IDES Inc. Peter Voorhees, Northwestern University Yimei Zhu, Brookhaven National Laboratory Unable to attend: Kathy Harkay, Argonne National Laboratory CBB EAB meeting | Closeout 18 5/31/2023
