Sökning: "Per Fröjdh"

Hittade 4 avhandlingar innehållade orden Per Fröjdh.

  1. 1. Criticality and Frustration: Classical and Quantum Spin Models in Two Dimensions

    Författare :Per Fröjdh; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : We investigate two-dimensional spin models and begin with an introduction to critical phenomena with emphasis on classical systems with boundaries and conformal invariance. Then we introduce the antiferromagnetic quantum Heisenberg model with frustrating interactions. LÄS MER

  3. 2. The tricritical ising model in restricted domains

    Författare :Per Fröjdh; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; conformal field theory; tricritical Ising model; correlation functions; finite-size scaling; multicritical phenomena;

    Sammanfattning : .... LÄS MER

  4. 3. Design and characterization of 64K pixels chips working in single photon processing mode

    Författare :Xavier Llopart Cudié; Christer Fröjdh; Michael Campbell; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; Elektronik;

    Sammanfattning : Progress in CMOS technology and in fine pitch bump bonding has made possible the development of high granularity single photon counting detectors for X-ray imaging. This thesis studies the design and characterization of three pulse processing chips with 65536 square pixels of 55 μm x 55 μm designed in a commercial 0. LÄS MER

  5. 4. Advanced X-ray Detectors for Industrial and Environmental Applications

    Författare :Salim Reza; Christer Fröjdh; Börje Norlin; Heinz Graafsma; Fulvia Arfelli; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering;

    Sammanfattning : The new generation of X-ray free electron laser sources arecapable of producing light beams with billion times higherpeak brilliance than that of the best conventional X-ray sources.This advancement motivates the scientific community to pushforward the detector technology to its limit, in order to de-sign photon detectors which can cope with the extreme fluxgenerated by the free electron laser sources. LÄS MER