Check-in Room: Bildungszentrum OSGA/EG06

1. Introduction to unfolding

• Marcel Reginatto (PTB)

Room: Bildungszentrum OSGA/EG06 a. What is unfolding and why is it difficult? b. Conceptual issues, mathematical issues c. Some examples of unfolding for particle detectors d. Review of different approaches to the problem of unfolding

2. Bonner spheres I

• Neil Roberts (NPL)

Room: Bildungszentrum OSGA/EG06 Basic principles, neutron thermal counters, experimental aspects, standard and extended range Bonner sphere spectrometers, etc.

The role of prior information in unfolding Bonner sphere data

• Marcel Reginatto (PTB)

Room: Bildungszentrum OSGA/EG06 a. Why is it important? b. Types of prior information c. How to incorporate prior information into unfolding methods d. Some statistics relevant to the topic (counting statistics, chi-squared, etc.) e. How to choose initial estimates of spectra, etc. Sensitivity analysis

Installation of the unfolding programs and of the Bayesian program

• Marcel Reginatto
• Benjamin Lutz
• Eike Hohmann

Room: Bildungszentrum OSGA/EG06

Simple preliminary exercises (to be determined, perhaps measurements at a reactor)

• Benjamin Lutz
• Marcel Reginatto (PTB)
• Eike Hohmann

Room: Bildungszentrum OSGA/EG06 a. Description of the experimental set-ups b. What problems may one encounter with the examples? c. Real or simulated data to be used for the unfolding

Validation of Bonner sphere response functions with sources and mono-energetic beams.

• Neil Roberts (NPL)

Room: Bildungszentrum OSGA/EG06

Review of unfolding methods, part I

• Marcel Reginatto (PTB)

Room: Bildungszentrum OSGA/EG06 a. Why direct inversion fails b. Direct inversion and “fix it” approaches c. Regularization methods d. Linear least-square methods e. Iterative methods f. Other approaches: Stochastic methods, neural networks, etc.

Review of unfolding methods, part II

• Marcel Reginatto (PTB)

Room: Bildungszentrum OSGA/EG06 a. Maximum entropy unfolding b. Bayesian Parameter estimation and uncertainties

Some relatively simple Bonner sphere unfolding problems (to be determined, perhaps measurements at an accelerator behind shielding)

• Eike Hohmann (Paul Scherrer Institut)
• Marcel Reginatto (PTB)
• Benjamin Lutz

Room: Bildungszentrum OSGA/EG06 a. Description of the experimental set-ups b. What problems may one encounter with the examples? c. Real or simulated data to be used for the unfolding

Some relatively simple Bonner sphere unfolding problems (to be determined, perhaps measurements at an accelerator behind shielding)

• Eike Hohmann (Paul Scherrer Institut)
• Benjamin Lutz
• Marcel Reginatto (PTB)

Room: Bildungszentrum OSGA/EG06

Special topics: Bonner spheres II: Calculation of the response function with Monte Carlo codes, problem of the cross sections at high energy

• Vladimir Mares

Room: Bildungszentrum OSGA/EG06 1. Bonner spheres II: Calculation of the response function with Monte Carlo codes, problem of the cross sections at high energy 2. Measurement of cosmic ray induced neutrons

Typical neutron spectra of workplace fields, review of existing reference facilities

• Neil Roberts (NPL)

Room: Bildungszentrum OSGA/EG06 a. Reference fields (sources, monoenergetic beams, high energy quasi-monoenergetic beams) b. Workplace and other fields (to be determined)

Approaches to the unfolding of Bonner sphere measurements for the validation of Monte Carlo simulations, focusing on the special case of Bonner sphere measurements at proton therapy facilities

• Benjamin Lutz
• Marcel Reginatto (PTB)
• Eike Hohmann

Room: Bildungszentrum OSGA/EG06 a. Description of the experimental set-ups b. What problems may one encounter with the examples? c. Real or simulated data to be used for the unfolding

A Bayesian analysis of one of these examples

• Eike Hohmann
• Benjamin Lutz
• Marcel Reginatto (PTB)

Room: Bildungszentrum OSGA/EG06 A Bayesian analysis of one of these examples

Special topics: Facilities representing the new generation of particle acceleration technology (high power lasers, free electron lasers), other facilities

• Veronika Olšovcová,

Room: Bildungszentrum OSGA/EG06 Facilities representing the new generation of particle acceleration technology (high power lasers, free electron lasers), other facilities

Dead time correction, pulsed neutrons, etc.

• Marco Caresana

Room: Bildungszentrum OSGA/EG06

Questions from the participants and further discussion with experts about topics of interest, feedback from the participants, closing of the course

• All lecturers

Room: Bildungszentrum OSGA/EG06