INTERNATIONAL WORKSHOP GRAVITY, SPECTROSCOPY AND INTERFERENCE WITH ATOMS AND NEUTRONS

University of Turku is organizing a workshop of the GRASIAN collaboration on 30.06 – 2.07.2025.

The worksshop venue is Villa Wolax located in Kuusisto island of Turku archipelago: https://www.villawolax.fi

Program

Monday, 30 June

9:45-10:00       Opening

10:00-10:35     Valery Nesvizhevsky      “Options for measuring WGS gravitational shifts: neutrons, hydrogen, antihydrogen, positronium, muonium”;

10:35-11:10       Jason Pioquinto             “ Theory of the WGS”;

11:10-11:45        Sergey Vasiliev                 “Experiments with H adsorbed on liquid helium films. Review of our work in Turku”;

11:45-12:20       Alex Voronin                   ” Strongly bound quantum states of H atoms on the surface of Helium film”;

12:20-14:00                      Lunch break

14:00-14:35       Aleksei Semakin            “Loading IPT with hydrogen at Turku and progress towards experiments in the second trap”;

14:35-15:20        Janne Ahokas                “Experiments with H atoms trapped in solid matrixes of H2 and neon”;

15:20-15-50        Tom Kiilerich                “Towards 1S-2S spectroscopy of trapped H gas”

          15:50-16:20         Anders Wallin              “VTT MIKES 88Sr+ optical clock: towards 1e-18 uncertainty and beyond”

16:20-16:50                                Coffee break

16:50-19:30        Tour in the lab in Turku

19:30                                            Dinner

Tuesday 1 July

8:30-9:10             Claudio Lenz Cesar        Spectroscopy of Trapped Antihydrogen and Method for Direct Comparison with Hydrogen

9:10-9:45              Markus Maehring          “Latest results and current status of the MuMASS experiment”;

9:45-10:20            Evans Javary                   “Latest results and future prospects of the Positronium 1S-2S experiment”;

10:20-10:40                                  Coffee break

10:40-11:15            Stefan Baessler               ” Constraints of short range forces”;

11:15-1:50               Katharina Schreiner      “Analysis of neutron whispering gallery states with magnetic shift”;

11:50-12:25            Carina Killian                  “ Update on the SMI flight through experiment”,

12:25-14:00                                    Lunch break

14:00-14:40            Eberhard Widmann       “Hyperfine spectroscopy of antihydrogen, hydrogen, and deuterium”;

14:40-15:15             Daniel Kloppenburg        “Measurements of vibrations on the apparatus at SMI”;

15:15-15:50             Elio Bera                          “ A Zeeman decelerator for H beams at 50 m/s”;

15:50-16:20                                   Coffee break

16:20-16:55             Pierre Clade (online)       “Single-bounce quantum gravimeter to measure the free-fall of anti-hydrogen”;

16:55-18:30             Discussions;

18:30                                      Dinner

19:30 – Continue discussions in Sauna

 

List of participants

“ILL” :

  • Alexei Voronin
  • Jason Pioquinto
  • Stefan Baessler
  • Valery Nesvizhevsky

SMI/ LKB

  • Katharina Schreiner
  • Elio Bera
  • Daniel Kloppenburg
  • Eberhard Widmann
  • Carina Killian
  • Pierre Clade
  • Francois Nez
  • Pauline Yzombard

ETH Zurich:

  • Paolo Crivelli
  • Markus Maehring
  • Evans Javary

UTU:

  • Aleksei Semakin
  • Sergey Vasiliev
  • Tom Kiilerich
  • Janne Ahokas
  • Kalle-Antti Suominen

VTT MIKES, Helsinki

  • Anders Wallin

FURJ

  • Claudio Lenz Cesar

Workshop fee

All participants are requested to pay a workshop fee:

559€/person for accommodation in a single room;

395.5€/person for accommodation in a double room (shared with other participant)

194€/person without accommodatioon (local participants or those who prefer to stay in the city of Turku hotels)

These prices include:

  • accomodation for three nights (29.06-2.07) in desired room type,
  • Breakfast for three mornings,
  • Lunch for each meeting day,
  • Afternoon coffee break for each meeting day.

Travel instructions

Fly to Helsinki airport, then go to the bus station following the signs. Buses go to Turku approximately every second hour. You may find the bus timetable and purchase the ticket  online (https://www.matkahuolto.fi/en) or entering the bus from the driver (slightly more expensive). Please, inform us about your flight schedule and we will assit in transportation from Turku bus station to Villa Wolax, the workshop venue.

Timetable for buses on Sunday, 29.06

Departure from Helsinki  airport: 12:10; 14:10; 16:10; 16:30 (Finnair bus, can be booked only together with the Finnair ticket in-advance); 18:10; 20:10. Travel time 2 hours.

Timetable for buses on Wednesday, 02.07

Departue from Turku bus station: 6:45; 8:45; 10:45; 12:45; 12:50 (Finnair bus, can be booked only together with the Finnair ticket in-advance); 14:45; 16:45. Travel time 2 hours.