Macropixel and macropixel-based particle and radiation detector
An arrangement for determining an energy spectrum of a beam of radiation or particles is disclosed. The arrangement comprises a plurality of polymeric bodies. Each of the plurality of polymeric bodies includes an optical waveguide. Each of the plurality of polymeric bodies has a scintillator disposed at a respective end of the optical waveguide. The scintillators are arranged relative to each other such that an energy resolution of a particle beam incident on the arrangement can be determined. Furthermore, a particle detector with the arrangement and an evaluation unit for reading out the particle detector are disclosed.
1. An arrangement ( 100 ) for determining an energy spectrum of a particle beam, comprising
a plurality of polymeric bodies ( 110 ), each of said plurality of polymeric bodies ( 110 ) comprising
an optical waveguide ( 112 ) and
a scintillator ( 114 ) disposed at a respective end of said optical waveguide ( 112 ),
said scintillators ( 114 ) being arranged relative to each other such that an energy spectrum of a particle beam incident on said arrangement ( 100 ) is determinable,
wherein the arrangement ( 100 ) comprises a continuous polymeric support structure ( 120 ), and
wherein the plurality of polymeric bodies ( 110 ) are embedded at different distances from a second surface (A) in the continuous polymeric support structure ( 120 ) to enable energy resolution by different penetration depths of the particles of the particle beam, the second surface (A) being an incident surface of the particle beam.
2. The arrangement ( 100 ) according to claim 1 ,
wherein the optical waveguides ( 112 ) of the plurality of polymeric bodies ( 110 ) have different lengths, and respective ends of the optical waveguides ( 112 ) are aligned on a common plane (E; F) such that the scintillators ( 114 ) have different distances from the common plane (E; F).
3. The arrangement ( 100 ) according to claim 1 ,
wherein the continuous support structure ( 120 ) is built up of individual layers, which are layered in a longitudinal direction of the optical waveguides ( 112 ), so that a shortest and longest distance of the polymeric bodies ( 110 ) to a common plane (A) determines a detectable energy range.
4. The arrangement ( 100 ) according to claim 3 ,
wherein a number of the layers is equal to or smaller or larger than a number of the scintillators ( 114 ).
5. The arrangement ( 100 ) according to claim 1 ,
wherein the plurality of polymeric bodies ( 110 ) are cylindrical or polygonal and are arranged parallel to each other.
6. The arrangement ( 100 ) according to claim 1 ,
wherein the scintillators ( 114 ) and the optical waveguides ( 112 ) are of the same polymer base material and comprise different doping.
7. The arrangement ( 100 ) according to claim 6 ,
wherein the continuous support structure ( 120 ) is of the same polymer base material as the scintillators ( 114 ) and the optical waveguides ( 112 ),
wherein the continuous support structure ( 120 ) has the same or different doping as the scintillators ( 114 ) and/or the optical waveguides ( 112 ).
8. The Arrangement ( 100 ) according to claim 1 ,
wherein the energy spectrum of the particle beam has an unknown energy distribution and a scintillator ( 114 ) arranged at the respective end of the optical waveguide ( 112 ) has a diameter of less than 1 mm, and
wherein the scintillators ( 114 ) are arranged relative to one another in such a way that the energy spectrum of a particle beam impinging perpendicularly on a surface (A) of the arrangement ( 100 ) can be determined.
9. The arrangement ( 100 ) according to claim 1 ,
wherein at least some of the scintillators ( 114 ) and/or optical waveguides ( 112 ) and/or polymeric bodies ( 110 ) comprise a reflective coating which is formed over an entire surface or in part.
10. The arrangement ( 100 ) according to claim 1 ,
wherein a plurality of scintillators ( 114 ) are formed in the optical waveguides ( 112 ) on a plane perpendicular to a light propagation.
11. A particle detector comprising at least one arrangement ( 100 ) for determining an energy spectrum of a particle beam, comprising:
a plurality of polymeric bodies ( 110 ), each of said plurality of polymeric bodies ( 110 ) comprising
an optical waveguide ( 112 ) and
a scintillator ( 114 ) disposed at a respective end of said optical waveguide ( 112 ),
said scintillators ( 114 ) being arranged relative to each other such that an energy spectrum of a particle beam incident on said arrangement ( 100 ) is determinable,
wherein each arrangement ( 100 ) is a macropixel of the particle detector and their number per unit area defines an achievable spatial resolution.
12. The particle detector according to claim 11 ,
wherein all macropixels are embedded in the continuous support structure.
13. An arrangement ( 100 ) for determining an energy spectrum of a particle beam, comprising:
a polymer support structure ( 120 ) having a first surface (E) at one end and a second surface (A) at an opposite end; and
a plurality of polymeric bodies ( 110 ) extending from the first surface (E) towards the second surface (A), each of the polymeric bodies ( 110 ) comprising
an optical fiber ( 112 ) having one end at the first surface (E) and
a scintillator ( 114 ) disposed at an opposite end of the optical fiber ( 112 ),
wherein the scintillators ( 114 ) are arranged at different distances from the second surface (A).