Tesla Technology Collaboration (TTC2027)

Jan 26, 2027, 8:30 AM → Jan 29, 2027, 6:00 PM US/Eastern

CEBAF Center - Auditorium (Jefferson Lab)

Rong-Li Geng (Thomas Jefferson National Accelerator Facility)

The mission of the TESLA Technology Collaboration (TTC) is to advance superconducting RF (SRF) accelerator R & D and related accelerator studies across the broad diversity of scientific applications, and to keep open and provide a bridge for communication and sharing of ideas, developments, and testing across associated projects.

To this end the Collaboration supports and encourages free and open exchange of scientific and technical knowledge, expertise, engineering designs, and equipment.

We cordially welcome you to join the TTC meeting to be held at Jefferson Lab, Newport News, VA USA on January 26-29, 2027.

In line with TTC spirit, the registration at this event is free of charge. However, the social event will be at your expense.

 

 

Poster TTC2027_poster.pdf

Tue, January 26

Registration

Welcome & Introduction

1 Opening Talk

Speaker: Rong-Li Geng (Thomas Jefferson National Accelerator Facility)

2 Welcome by TJNAF Deputy Lab Director

Speaker: Eric Brown (TJNAF)

3 Introduction and update from the last TTC Meeting

Speaker: Robert Laxdal (TRIUMF)

Plenary Session: Talks

4 SRF Activities of Jefferson Lab

Speaker: Rong-Li Geng (Thomas Jefferson National Accelerator Facility)

5 Strategy/Roadmap for SRF development in North America

Speaker: Sam Posen

10:30 AM Coffee Break

WG-1: Understanding the recent High-Q/ High-G performance

This working group is tasked with improving our understanding of the mid-T bake process.

6 Introduction to WG1

Speakers: Eric Lechner (Jefferson Lab), Kensei Umemori (KEK), Marc Wenskat (DESY)

7 Theory Review

Speaker: Alexander Gurevich (ODU)

8 Mid T at Various Frequencies

Speaker: Philipp Kolb (TRIUMF)

9 N-doping and Mid-T performance

Speaker: Jinfang Chen (Shanghai Advanced Research Institute)

10 Discussion

Speakers: Eric Lechner (Jefferson Lab), Kensei Umemori (KEK), Marc Wenskat (DESY)

WG-2: High power couplers and HOM couplers – RF and cryogenic performance

This working group is tasked with improving our understanding of the current state of high-power couplers (FPC and HOM) and how to incorporate them into cryomodules for low thermal impact.

11 Introduction of WG2 topics, schedule plan, encouraging discussion

12 High-Power FPC Development for the EIC

Speaker: Wencan Xu (BNL)

13 FPC deveopment for FCC/Hilumi crab cavity

14 FPCs and HOMs at the cERL

Speaker: Mathieu Omet

15 Recent Progress of Power Couplers for Half-Wave Resonators at the Institute for Rare Isotope Science

16 Discussion

Speaker: Wencan Xu (BNL)

12:30 PM Lunch

WG-1: Understanding the recent High-Q/ High-G performance

This working group is tasked with improving our understanding of the mid-T bake process.

17 Material Review

Speaker: Eric Lechner (Jefferson Lab)

18 Flux Trapping and Sensitivity Review

Speaker: Felix Kramer (Helmholtz-Zentrum Berlin)

19 Importance of Microstructure

Speakers: Shreyas Balachandran (FSU), Shreyas Balachandran (ASC-FSU-NHMFL)

20 Performance Degradation Questionaire and Discussion

Speakers: Eric Lechner (Jefferson Lab), Kensei Umemori (KEK), Marc Wenskat (DESY)

WG-2: High power couplers and HOM couplers – RF and cryogenic performance

This working group is tasked with improving our understanding of the current state of high-power couplers (FPC and HOM) and how to incorporate them into cryomodules for low thermal impact.

21 PIP-II Power Couplers: Status, Issues, and Thermal Performance

22 Thermal design for megawatt-class FPC

23 FPC for XFEL upgrade

24 Status and Operational Experience of FPC and HOM Dampers for the TPS 500 MHz and 1.5 GHz SRF Cavities

25 Discussion

Speaker: Wencan Xu (BNL)

3:30 PM Coffee Break

WG-2: High power couplers and HOM couplers – RF and cryogenic performance

This working group is tasked with improving our understanding of the current state of high-power couplers (FPC and HOM) and how to incorporate them into cryomodules for low thermal impact.

26 SiC HOM Damper for the EIC 591 MHz SRF Cavities

27 Placeholder

28 HOM damping for crab cavities.

29 HOM damping for FCC/Hilumi LHC

30 Test results of the Jlab on-cell-damped (OCD) storage ring cavity

Speaker: Robert Rimmer (JLab)

31 Discussion

Speaker: Wencan Xu (BNL)

WG1: Understanding the recent High-Q/ High-G performance

This working group is tasked with improving our understanding of the mid-T bake process.

32 Recipe Transfer from Single-cell to Nine-cell

Speaker: Lea Steder (DESY)

33 Technical vs. Physical Recipe

Speaker: David Longuevergne (IPN-Orsay)

34 Experiences with Postfurnace Chemistry

Speaker: Hayato Ito (KEK)

35 HF-free Postfurnace Chemistry

Speaker: Masashi Nakanishi (Nomura Plating Co., Ltd.)

36 Discussion

Speakers: Eric Lechner (Jefferson Lab), Kensei Umemori (KEK), Marc Wenskat (DESY)

5:30 PM Break

CB Meeting

Wed, January 27

Plenary Session: Talks

37 SNS - 20 years of SRF experience

Speaker: Sang-ho Kim (Oak Ridge National Laboratory)

38 Report from ERL Workshop

Speaker: Mathieu Omet

39 Report from Thin Films Workshop

Speaker: Reza Valizadeh (STFC)

10:30 AM Coffee Break

WG-2: High power couplers and HOM couplers – RF and cryogenic performance

This working group is tasked with improving our understanding of the current state of high-power couplers (FPC and HOM) and how to incorporate them into cryomodules for low thermal impact.

40 HOM and FPC integration for EIC ESR cryomodule

Speaker: Gary Cheng (Jefferson Lab)

41 FPC for conduction cooling cryomodule at Jlab

Speaker: Neil Stilin (Jefferson Lab)

42 Design of a 1.3 GHz Forward Power Coupler for the Cornell Conduction-Cooled Nb3Sn Cryomodule (CM4)

43 FPC with reduced cryogenic heat loads (conduction-cooled accelerators)

44 Discussion

Speaker: Wencan Xu (BNL)

WG1: Understanding the recent High-Q/ High-G performance

This working group is tasked with improving our understanding of the mid-T bake process.

45 LCLS-II Material and Technology Transfer

46 CERN Tech Transfer

Speaker: Frank Peauger (CERN)

47 Technology Transfer at S3FEL

Speaker: Wang Zhi (ISAF)

48 Technology transfer of Mid-T baking under mass production at SHINE

Speaker: Yue Zong (Shanghai Advanced Research Institute, Chinese Academy of Sciences)

49 Discussion

Speakers: Eric Lechner (Jefferson Lab), Kensei Umemori (KEK), Marc Wenskat (DESY)

12:30 PM Lunch Break

WG-3: Standardization of VT protocols

This working group is tasked with improving our understanding of the current state of the means and methods of SRF cavity vertical tests.

50 Introduction

Speakers: Anna Shabalina (STFC), Heetae Kim (IRIS-IBIS), Kellen McGee (FNAL)

51 Vertical-Test Qualification and Repeatability of SHINE SRF Cavities

52 Vertical Test Experience at IRIS toward Standardized Vertical Test Protocols

Speaker: Heetae Kim (IRIS-IBIS)

53 VT Diagnostics and Inter-Laboratory Repeatability

Speaker: Kensei Umemori (KEK)

54 Placeholder

WG4: Origins of cavity degradation in cryomodule operation

This working group is tasked with improving our understanding of the mechanisms that can trigger a reduction in SRF cavity performance during on-line operation.

55 Overview of session structures for WG4

Speakers: Aveen Mahon (TRIUMF), Frank Peauger (CERN), Naruhiko Sakamoto (RIKEN)

56 CEBAF - Machine Overview and Operational Status

Speaker: Tom Powers (JLAB)

57 Machine Overview and Current Operational Status (Rapid Fire)

Speakers: Aveen Mahon (TRIUMF), Frank Peauger (CERN), Naruhiko Sakamoto (RIKEN)

58 Discussion

Speakers: Aveen Mahon (TRIUMF), Frank Peauger (CERN), Naruhiko Sakamoto (RIKEN)

3:30 PM Coffee Break

WG-3: Standardization of VT protocols

This working group is tasked with improving our understanding of the current state of the means and methods of SRF cavity vertical tests.

59 Radiation Detection Standardization

Speaker: Laura Grassellino (FNAL)

60 Evolution of Field Emission from Vertical Test to Subsequent Operation for RIKEN SC-QWRs

61 Placeholder

62 Placeholder

WG4: Origins of cavity degradation in cryomodule operation

This working group is tasked with improving our understanding of the mechanisms that can trigger a reduction in SRF cavity performance during on-line operation.

63 Cavity degradation experience with the LHC at CERN

Speaker: Frank Peauger (CERN)

64 Observation of Cavity Degradation (Rapid Fire)

Speakers: Aveen Mahon (TRIUMF), Frank Peauger (CERN), Naruhiko Sakamoto (RIKEN)

65 Discussion: Observation of Cavity Degradation

Speakers: Aveen Mahon (TRIUMF), Frank Peauger (CERN), Naruhiko Sakamoto (RIKEN)

5:30 PM Break

TB Meeting

Thu, January 28

Plenary Session: Talks

66 SRF Commissioning of the SHINE Linac

Speaker: Yubin zhao (Shanghai Advanced Research Institute. CAS)

67 Survey of Conduction cooled cryomodule development in North America

Speaker: Gianluigi Ciovati (JLab)

68 Experience from ESS commissioning

Speaker: Cecilia Maiano

10:30 AM Coffee Break

WG-3: Standardization of VT protocols

This working group is tasked with improving our understanding of the current state of the means and methods of SRF cavity vertical tests.

69 KAT SRF Cavity Manufacturing and Quality Assurance toward Standardized Vertical Test Protocols

70 VT Data Handling at KEK

Speaker: Mathieu Omet

71 Placeholder

72 Cavity Vertical Testing at DESY: Comparing Movable vs. Fixed Input Antennas

WG4: Origins of cavity degradation in cryomodule operation

This working group is tasked with improving our understanding of the mechanisms that can trigger a reduction in SRF cavity performance during on-line operation.

73 Cavity degradation experience with the compact Energy-Recovery Linac (cERL) at KEK

Speaker: Hiroshi Sakai (KEK)

74 Triggers and Associated Factors of Cavity Degradation (Rapid Fire)

Speakers: Aveen Mahon (TRIUMF), Frank Peauger (CERN), Naruhiko Sakamoto (RIKEN)

75 Discussion: Triggers and Associated Factors of Cavity Degradation

Speakers: Aveen Mahon (TRIUMF), Frank Peauger (CERN), Naruhiko Sakamoto (RIKEN)

12:30 PM Lunch Break

WG-3: Standardization of VT protocols

This working group is tasked with improving our understanding of the current state of the means and methods of SRF cavity vertical tests.

76 Magnetic Flux Expulsion and Sensitivity Studies

Speaker: Kellen McGee (FNAL)

77 Suppression of Thermoelectric Currents on Nb₃Sn/Cu vs Nb, cooldown speeds

78 Experience with Passive/Active Magnetic Shielding

79 Placeholder

WG4: Origins of cavity degradation in cryomodule operation

This working group is tasked with improving our understanding of the mechanisms that can trigger a reduction in SRF cavity performance during on-line operation.

80 Cavity degradation experience with ISAC-II at TRIUMF

Speaker: Zhongyuan Yao (TRIUMF)

81 Mechanism of FE Activation and Q Degradation (Rapid Fire)

Speakers: Aveen Mahon (TRIUMF), Frank Peauger (CERN), Naruhiko Sakamoto (RIKEN)

82 Discussion: Mechanism of FE Activation and Q Degradation

Speakers: Aveen Mahon (TRIUMF), Frank Peauger (CERN), Naruhiko Sakamoto (RIKEN)

3:30 PM Coffee Break

Hot Topics

5:30 PM Break

Social Event - Tradition Brewing Company - No Host

https://traditionbrewing.com/

Fri, January 29

Special Seminars

83 Proton Therapy and Its Clinical Applications (tentative title) - Dr. Allan Thornton, Hampton University – Hampton Proton Cancer Institute

Speaker: Dr Allan Thornton (Hampton University – Hampton Proton Cancer Institute)

84 Magnetism in One Dimension - Prof. Despina Louca, University of Virginia Physics Department

Speaker: Prof. Despina Louca (University of Virginia)

10:30 AM Coffee Break

Plenary Session: Summary

85 Summary WG1

86 Summary WG2

87 Summary WG3

88 Summary WG4

Plenary Session: Closing

89 TB Report

90 CB Report

91 Closing

1:00 PM Lunch Break

Lab Tour: TBD

Tour Highlights (Details to be Announced)
• Tour Safety Briefing
• Group Photo
• Test Lab
• CEBAF Center
• Machine Control Center / Central Helium Liquefier (MCC/CHL)
• Experimental Hall A (or C)