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  1. Book ; Online: Untersuchungen der Ortsdosisleistung in Flugzeugen unter Berücksichtigung des Sonnenzyklus, der Lageveränderung der magnetischen Pole und der Auswirkung von solaren Ereignissen zur Qualitätssicherung der Dosisermittlung für das fliegende Personal

    Wissmann, Frank

    Vorhaben 3608S10003

    (Ressortforschungsberichte zur kerntechnischen Sicherheit und zum Strahlenschutz ; 93/14)

    2014  

    Institution Deutschland / Bundesamt für Strahlenschutz
    Author's details Frank Wissmann ; Bundesamt für Strahlenschutz
    Series title Ressortforschungsberichte zur kerntechnischen Sicherheit und zum Strahlenschutz ; 93/14
    Collection
    Language German
    Size III, 49 S. : graph. Darst., Kt.
    Publisher Bundesamt für Strahlenschutz
    Publishing place Salzgitter
    Publishing country Germany
    Document type Book ; Online
    HBZ-ID HT019086395
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: A simple method to monitor the dose rate of secondary cosmic radiation at altitude.

    Wissmann, F / Klages, Th

    Journal of radiological protection : official journal of the Society for Radiological Protection

    2018  Volume 39, Issue 1, Page(s) 71–84

    Abstract: Monitoring the ambient dose equivalent rate at aviation altitudes is an ambitious task, which requires sophisticated dosemeter systems and the possibility to carry out such measurements on board aircraft. A rather simple approach has been investigated in ...

    Abstract Monitoring the ambient dose equivalent rate at aviation altitudes is an ambitious task, which requires sophisticated dosemeter systems and the possibility to carry out such measurements on board aircraft. A rather simple approach has been investigated in this study: soundings with weather balloons up to an altitude of 30 km. This paper summarises the measurements carried out between 2011 and 2016. The results indicate that annual measurements of the ambient dose equivalent rate at altitudes of around 20 km are a reliable tool to monitor the variation of the dose rate in the atmosphere owing to the solar activity.
    MeSH term(s) Altitude ; Cosmic Radiation ; Radiation Dosage ; Radiation Monitoring/methods
    Language English
    Publishing date 2018-12-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 639411-5
    ISSN 1361-6498 ; 0952-4746
    ISSN (online) 1361-6498
    ISSN 0952-4746
    DOI 10.1088/1361-6498/aaeeae
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  3. Book ; Thesis: Multifaktorielle Analyse von Schußverletzungen durch Jagdwaffen

    Wissmann, Frank

    1993  

    Author's details vorgelegt von: Frank Wissmann
    Keywords Schussverletzung ; Jagdwaffe
    Subject Geschosswunde ; Schusswunde ; Jagd
    Language German
    Size 156 Bl. : graph. Darst.
    Edition [Mikrofiche-Ausg.]
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Münster (Westfalen), Univ., Diss., 1993
    Note 2 Mikrofiches
    HBZ-ID HT006316079
    Database Catalogue ZB MED Medicine, Health

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    Shelf markLoan statusLocation
    1994 MB 1636 order for loan Magazin

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  4. Article: Long-term measurements of H*(10) at aviation altitudes in the northern hemisphere.

    Wissmann, F

    Radiation protection dosimetry

    2006  Volume 121, Issue 4, Page(s) 347–357

    Abstract: Monitoring the radiation field at aviation altitudes is achieved by the dosemeter system piDOS installed in a passenger aircraft. The basic detector is a 2 in. tissue-equivalent proportional counter (TEPC) mounted in a cabin-baggage-sized aluminium ... ...

    Abstract Monitoring the radiation field at aviation altitudes is achieved by the dosemeter system piDOS installed in a passenger aircraft. The basic detector is a 2 in. tissue-equivalent proportional counter (TEPC) mounted in a cabin-baggage-sized aluminium suitcase. The entire system was characterised in neutron and photon reference fields from which two calibration factors were determined according to the splitting of the measured dose deposition spectrum yd(y) into low-LET and high-LET regions. A total of 255 flights in the northern hemisphere was analysed. The dependencies of the ambient dose equivalent rates on altitude, latitude and solar activity have been determined. These new data extend the data base used in Germany for the validation of program codes to calculate the radiation exposure of air crew members.
    MeSH term(s) Altitude ; Aviation/instrumentation ; Body Burden ; Cosmic Radiation ; Equipment Design ; Equipment Failure Analysis ; Miniaturization ; Neutrons ; Occupational Exposure/analysis ; Radiation Dosage ; Radiation Monitoring/instrumentation ; Radiation Monitoring/methods ; Radiation Protection/instrumentation ; Radiation Protection/methods ; Relative Biological Effectiveness ; Sensitivity and Specificity
    Language English
    Publishing date 2006
    Publishing country England
    Document type Evaluation Studies ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 225912-6
    ISSN 1742-3406 ; 0144-8420
    ISSN (online) 1742-3406
    ISSN 0144-8420
    DOI 10.1093/rpd/ncl053
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  5. Article: Variations observed in environmental radiation at ground level.

    Wissmann, F

    Radiation protection dosimetry

    2006  Volume 118, Issue 1, Page(s) 3–10

    Abstract: To investigate and monitor environmental radiation at ground level, Physikalisch-Technische Bundesanstalt (PTB) has installed several dosemeters and particle detectors at the new Ambient Radiation Dosimetry Site. The separation of the total ambient dose ... ...

    Abstract To investigate and monitor environmental radiation at ground level, Physikalisch-Technische Bundesanstalt (PTB) has installed several dosemeters and particle detectors at the new Ambient Radiation Dosimetry Site. The separation of the total ambient dose equivalent rate H*10(env) of environmental radiation into the different contributions is achieved by comparing the data of different detectors: the muon detector MUDOS, a modified neutron dosemeter, proportional counters and ionisation chambers. The response of the latter two dosemeter systems to cosmic radiation was determined at the Cosmic Radiation Dosimetry Site on a lake near PTB. Besides the increase of the ambient dose equivalent rate during rainfall, variations owing to air pressure, solar activity and temperature changes in the upper atmosphere are observed. Without rain and solar effects, smooth variations of the cosmic component at ground level of +/-6.9 nSv h(-1) should be treated as naturally occurring variations during an entire year.
    MeSH term(s) Air Pressure ; Cosmic Radiation ; Environmental Monitoring ; Germany ; Radiation Monitoring/methods ; Soil Pollutants, Radioactive/analysis ; Solar Activity ; Temperature ; Weather
    Chemical Substances Soil Pollutants, Radioactive
    Language English
    Publishing date 2006
    Publishing country England
    Document type Journal Article
    ZDB-ID 225912-6
    ISSN 1742-3406 ; 0144-8420
    ISSN (online) 1742-3406
    ISSN 0144-8420
    DOI 10.1093/rpd/nci317
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  6. Book: Untersuchungen der Ortsdosisleistung in Flugzeugen unter Beruecksichtigung des Sonnenzyklus, der Lageveraenderung der magnetischen Pole und der Auswirkung von solaren Ereignissen zur Qualitaetssicherung der Dosisermittlung fuer das fliegende Personal

    Wissmann, F.

    Abstract: Nach 103 StrlSchV ist die Strahlenexposition des fliegenden Personals zu ermitteln und zu ueberwachen. Dazu wird die Strahlenexposition in Flugzeugen mittels von in Deutschland zugelassenen Rechenprogrammen berechnet. Wesentliche Einflussparameter sind ... ...

    Title variant Verification of dose rate in aircraft taking into account the solar cycle, the dislocation of magnetic pole and solar particle events in order to quality control for radiation dose calculation of air crews
    Institution Physikalisch-Technische Bundesanstalt (PTB), 38023, 38023, Braunschweig, DE
    Abstract Nach 103 StrlSchV ist die Strahlenexposition des fliegenden Personals zu ermitteln und zu ueberwachen. Dazu wird die Strahlenexposition in Flugzeugen mittels von in Deutschland zugelassenen Rechenprogrammen berechnet. Wesentliche Einflussparameter sind der 11-jaehrige Sonnenzyklus und das unregelmaessige Auftreten von solaren Ereignissen (SPE). Mittels zahlreicher Messfluege mit geeigneten Messinstrumenten soll die Genauigkeit der Rechenprogramme verifiziert und der Einfluss der SPE auf die Dosiswerte ermittelt werden. Die Verifikation von Rechenprogrammen zur Ermittlung der Strahlenexposition in Flugzeugen erfolgt zurzeit noch auf der Basis von Messdaten aus den Jahren 1997 bis 1999 und 2004. Fuer eine qualitaetsgesicherte Dosisermittlung sind Messungen der Ortsdosisleistung in Flughoehen ueber mindestens einen halben Sonnenzyklus erforderlich. Ziel des Vorhabens ist die Entwicklung einer Datenbasis fuer die Zulassungspruefung von Programmen zur Ermittlung der Dosis des fliegenden Personals nach 103 StrlSchV sowie zur Validierung berechneter Dosen (z. B. fuer epidemiologische Studien) und die Entwicklung eines Verfahrens zur Ermittlung der Ersatzdosis beim Auftreten eines solaren Ereignisses.
    Keywords Strahlenexposition ; Flugzeug ; Computerprogramm ; Messgeraet ; Messdaten ; Dosisleistung ; Ionisierende Strahlung ; Datenbank ; Dosis ; Validierung ; Epidemiologie ; Qualitaetssicherung ; Luftfahrzeug ; Strahlendosis ; Berechnung ; Solarstrahlung ; Datensammlung ; Datengewinnung ; Messungen
    Language German
    Document type Book
    Remark Projektbeginn: 03.02.2009 Projektende: 31.01.2012 Foerdernummer: 3608S10003
    Database Environmental research database (UFORDAT) of the German Federal Environment Agency (UBA)

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  7. Article ; Online: Quality factor of secondary cosmic radiation at flight altitudes.

    Burda, O / Sato, T / Wissmann, F

    Journal of radiological protection : official journal of the Society for Radiological Protection

    2013  Volume 33, Issue 2, Page(s) 339–348

    Abstract: Dosimetry at aviation altitudes requires instruments that are able to measure the dose contributions of all field components. Tissue-equivalent proportional counters (TEPCs) are well suited for this task. From the measured lineal energy distribution, the ...

    Abstract Dosimetry at aviation altitudes requires instruments that are able to measure the dose contributions of all field components. Tissue-equivalent proportional counters (TEPCs) are well suited for this task. From the measured lineal energy distribution, the absorbed dose and the dose equivalent can be obtained. The ratio of both quantities is named the quality factor, which is a measure of the biological effectiveness of the radiation field. The results of this work show that the mean quality factors obtained by using a TEPC are independent of the altitude, at least at altitudes between flight level (FL) 300 and FL 400, but show a significant dependence on the vertical cutoff rigidity. From a numerical simulation of the radiation field inside an aircraft, the influence of the aircraft structure can be shown.
    MeSH term(s) Aircraft/instrumentation ; Algorithms ; Cosmic Radiation ; Data Interpretation, Statistical ; Equipment Design ; Equipment Failure Analysis ; Radiation Monitoring/instrumentation ; Reproducibility of Results ; Sensitivity and Specificity
    Language English
    Publishing date 2013-06
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 639411-5
    ISSN 1361-6498 ; 0952-4746
    ISSN (online) 1361-6498
    ISSN 0952-4746
    DOI 10.1088/0952-4746/33/2/339
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  8. Article ; Online: Dosimetry of secondary cosmic radiation up to an altitude of 30 km.

    Wissmann, F / Burda, O / Khurana, S / Klages, T / Langner, F

    Radiation protection dosimetry

    2014  Volume 161, Issue 1-4, Page(s) 299–302

    Abstract: Dosimetric measurements in the field of secondary cosmic radiation were extensively made during the last years. Since the majority of these measurements were performed on-board passenger aircraft at altitudes between 10 and 12 km, measurements at higher ... ...

    Abstract Dosimetric measurements in the field of secondary cosmic radiation were extensively made during the last years. Since the majority of these measurements were performed on-board passenger aircraft at altitudes between 10 and 12 km, measurements at higher altitudes are desirable for the verification of the legal dose assessment procedures for aircrew. A simple solution is to use a high-altitude balloon that reaches altitudes as high as 30 km. In this work, it is shown that the dose rate profile up to 30 km can be measured with acceptable uncertainties using a Si-detector.
    MeSH term(s) Aerospace Medicine/methods ; Aircraft ; Altitude ; Aviation ; Calibration ; Computer Simulation ; Cosmic Radiation ; Humans ; Occupational Exposure ; Pressure ; Radiation Dosage ; Radiation Monitoring/instrumentation ; Radiation Monitoring/methods ; Silicon/chemistry
    Chemical Substances Silicon (Z4152N8IUI)
    Language English
    Publishing date 2014-10
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 225912-6
    ISSN 1742-3406 ; 0144-8420
    ISSN (online) 1742-3406
    ISSN 0144-8420
    DOI 10.1093/rpd/nct329
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  9. Article ; Online: The ambient dose equivalent at flight altitudes: a fit to a large set of data using a Bayesian approach.

    Wissmann, F / Reginatto, M / Möller, T

    Journal of radiological protection : official journal of the Society for Radiological Protection

    2010  Volume 30, Issue 3, Page(s) 513–524

    Abstract: The problem of finding a simple, generally applicable description of worldwide measured ambient dose equivalent rates at aviation altitudes between 8 and 12 km is difficult to solve due to the large variety of functional forms and parametrisations that ... ...

    Abstract The problem of finding a simple, generally applicable description of worldwide measured ambient dose equivalent rates at aviation altitudes between 8 and 12 km is difficult to solve due to the large variety of functional forms and parametrisations that are possible. We present an approach that uses Bayesian statistics and Monte Carlo methods to fit mathematical models to a large set of data and to compare the different models. About 2500 data points measured in the periods 1997-1999 and 2003-2006 were used. Since the data cover wide ranges of barometric altitude, vertical cut-off rigidity and phases in the solar cycle 23, we developed functions which depend on these three variables. Whereas the dependence on the vertical cut-off rigidity is described by an exponential, the dependences on barometric altitude and solar activity may be approximated by linear functions in the ranges under consideration. Therefore, a simple Taylor expansion was used to define different models and to investigate the relevance of the different expansion coefficients. With the method presented here, it is possible to obtain probability distributions for each expansion coefficient and thus to extract reliable uncertainties even for the dose rate evaluated. The resulting function agrees well with new measurements made at fixed geographic positions and during long haul flights covering a wide range of latitudes.
    MeSH term(s) Aircraft ; Algorithms ; Altitude ; Atmosphere/analysis ; Bayes Theorem ; Computer Simulation ; Cosmic Radiation ; Databases, Factual ; Models, Theoretical ; Occupational Exposure/analysis ; Radiation Dosage ; Radiation Monitoring/methods
    Language English
    Publishing date 2010-09
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 639411-5
    ISSN 1361-6498 ; 0952-4746
    ISSN (online) 1361-6498
    ISSN 0952-4746
    DOI 10.1088/0952-4746/30/3/006
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  10. Book ; Thesis: Compton scattering

    Wissmann, Frank

    investigating the structure of the nucleon with real photons ; with 13 tables

    (Springer tracts in modern physics ; 200)

    2004  

    Author's details Frank Wissmann
    Series title Springer tracts in modern physics ; 200
    Keywords Nukleonenstruktur ; Compton-Effekt
    Language English
    Size VIII, 132 S, graph. Darst
    Publisher Springer
    Publishing place Berlin u.a.
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Univ., Habil.-Schr.--Göttingen, 2000
    Note Literaturangaben
    ISBN 3540407421 ; 9783540407423
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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