Walter Herrmann (physicist)
Encyclopedia
Walter Herrmann was a German
nuclear physicist who worked on the German nuclear energy project during World War II. After the war, he headed a laboratory for special issues of nuclear disintegration at Laboratory V in the Soviet Union.
in 1937.
on the use of uranium
fission
in a Uranmaschine (uranium machine, i.e., nuclear reactor), Georg Joos
, along with Hanle, notified Wilhelm Dames, at the Reichserziehungsministerium
(REM, Reich Ministry of Education), of potential military applications of nuclear energy. Just seven days later, a group, organized by Dames, met at the REM to discuss the potential of a sustained nuclear chain reaction
. The group included the physicists Walther Bothe
, Robert Döpel
, Hans Geiger, Wolfgang Gentner
, Wilhelm Hanle
, Gerhard Hoffmann
, and Joos. After this, informal work began at the Georg-August University of Göttingen, and the group of physicists was known informally as the first Uranverein (Uranium Club) and formally as Arbeitsgemeinschaft für Kernphysik. The second Uranverein began after the Heereswaffenamt (HWA, Army Ordnance Office) squeezed out the Reichsforschungsrat
(RFR, Reich Research Council) of the REM and started the formal German nuclear energy project
. The second Uranverein had its first meeting on 16 September 1939; the meeting was organized by Kurt Diebner
and held in Berlin. It was then that Kaiser-Wilhelm Institut für Physik (KWIP, after World War II reorganized and renamed the Max Planck Institute for Physics
), in Berlin-Dahlem
, was placed under HWA authority, with Diebner as the administrative director, and the military control of the nuclear research commenced. Some of the research was carried out at the Versuchsstelle (testing station) of the HWA in Gottow; Diebner, was director of the facility. When it was apparent that the nuclear energy project would not make a decisive contribution to ending the war effort in the near term, control of the KWIP was returned to the its umbrella organization, the Kaiser-Wilhelm Gesellschaft (KWG, after World War II renamed the Max-Planck Gesellschaft
) in January 1942 and control of the project was relinquished to the RFR that year. However, the HWA did maintain its testing station in Gottow and continue research there until the end of the war.
It was at the Gottow facility that Herrmann participated in nuclear fission
experiments designated G-I and G-III. The G-1 experiment had lattices of 6,800 uranium oxide cubes (about 25 tons) in the nuclear moderator paraffin. The work verified Karl Heinz Höcker’s
calculations that cubes were better than rods, and rods were better than plates. The G-III experiment was a small-scale design, but it generated an exceptionally high rate of neutron production. The G-III model was superior to nuclear fission chain reaction experiments that had been conducted at the KWIP in Berlin-Dahem, the University of Heidelberg, or the University of Leipzig
. Herrmann also participated in work to explore the initiation of a nuclear reaction through the detonation of explosives.
sent special search teams into Germany to locate and deport German nuclear scientists or any others who could be of use to the Soviet atomic bomb project
. The Russian Alsos
teams were headed by NKVD
Colonel General A. P. Zavenyagin and staffed with numerous scientists, from their only nuclear laboratory, attired in NKVD officer’s uniforms. In the autumn of 1945, Heinz Pose
was offered the opportunity to work in the Soviet Union, which he accepted. He arrived in the Soviet Union, with his family, in February 1946. He was to establish and head Laboratory V (also known by the code name Malojaroslavets-10, after the nearby town by the same name) in Obninsk
. The scientific staff at Laboratory V was to be both Soviet and German, the former being mostly political prisoners from the Gulag
or exiles; this type of facility is known as a Sharashka
. (Laboratory B
in Sungul’ was also a sharashka and working on the Soviet atomic bomb project. Notable Germans at Laboratory B were Hans-Joachim Born
, Alexander Catsch
, Nikolaus Riehl
, and Karl Zimmer
. Notable Russians from the Gulag were N. V. Timofeev-Resovskij and S. A. Voznesenskij.)
On 5 March 1946, in order to staff his laboratory, Pose and NKVD General Kravchenko, along with two other officers, went to Germany for six months to hire scientists. Additionally, Pose procured equipment from the companies AEG
, Carl Zeiss AG, Schott Jena
, and Mansfeld, which were in the Russian occupation zone.
Pose planned 16 laboratories for his institute, which was to include a chemistry laboratory and eight laboratories. Three heads of laboratories, Czulius, Herrmann, and Rexer, were Pose’s colleagues who worked with him at the German Army’s testing station in Gottow, under the Uranverein project. (See below: Internal Reports.) Eight laboratories in the institute were:
(Research Reports in Nuclear Physics), an internal publication of the German Uranverein
. The reports were classified Top Secret, they had very limited distribution, and the authors were not allowed to keep copies. The reports were confiscated under the Allied Operation Alsos
and sent to the United States Atomic Energy Commission
for evaluation. In 1971, the reports were declassified and returned to Germany. The reports are available at the Karlsruhe Nuclear Research Center and the American Institute of Physics
.
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...
nuclear physicist who worked on the German nuclear energy project during World War II. After the war, he headed a laboratory for special issues of nuclear disintegration at Laboratory V in the Soviet Union.
Biography
Walter Herrmann completed his engineering degree at the Dresden University of TechnologyDresden University of Technology
The Technische Universität Dresden is the largest institute of higher education in the city of Dresden, the largest university in Saxony and one of the 10 largest universities in Germany with 36,066 students...
in 1937.
In Germany
On 22 April 1939, after hearing a paper by Wilhelm HanleWilhelm Hanle
Wilhelm Hanle was a German experimental physicist. He is known for the Hanle effect. During World War II, he made contributions to the German nuclear energy project, also known as the Uranium Club...
on the use of uranium
Uranium
Uranium is a silvery-white metallic chemical element in the actinide series of the periodic table, with atomic number 92. It is assigned the chemical symbol U. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons...
fission
Nuclear fission
In nuclear physics and nuclear chemistry, nuclear fission is a nuclear reaction in which the nucleus of an atom splits into smaller parts , often producing free neutrons and photons , and releasing a tremendous amount of energy...
in a Uranmaschine (uranium machine, i.e., nuclear reactor), Georg Joos
Georg Joos
Georg Jakob Christof Joos was a German theoretical physicist. He wrote Lehrbuch der theoretischen Physik, first published in 1932 and one of the most influential theoretical physics textbooks of the 20th Century.-Education:Joos began his higher education in 1912 at the Technische Hochschule...
, along with Hanle, notified Wilhelm Dames, at the Reichserziehungsministerium
Reichserziehungsministerium
The Reichserziehungsministerium was officially known as the Reichsministerium für Wissenschaft, Erziehung und Volksbildung .-Background:...
(REM, Reich Ministry of Education), of potential military applications of nuclear energy. Just seven days later, a group, organized by Dames, met at the REM to discuss the potential of a sustained nuclear chain reaction
Nuclear chain reaction
A nuclear chain reaction occurs when one nuclear reaction causes an average of one or more nuclear reactions, thus leading to a self-propagating number of these reactions. The specific nuclear reaction may be the fission of heavy isotopes or the fusion of light isotopes...
. The group included the physicists Walther Bothe
Walther Bothe
Walther Wilhelm Georg Bothe was a German nuclear physicist, who shared the Nobel Prize in Physics in 1954 with Max Born....
, Robert Döpel
Robert Döpel
Georg Robert Döpel was a German experimental nuclear physicist. He was a participant in a group known as the “first Uranverein,” which was spawned by a meeting conducted by the Reichserziehungsministerium, in April 1939, to discuss the potential of a sustained nuclear reaction...
, Hans Geiger, Wolfgang Gentner
Wolfgang Gentner
Wolfgang Gentner was a German experimental nuclear physicist.Gentner received his doctorate in 1930 from the University of Frankfurt. From 1932 to 1935 he had a fellowship which allowed him to do postdoctoral research and study at Curie's Radium Institute at the University of Paris...
, Wilhelm Hanle
Wilhelm Hanle
Wilhelm Hanle was a German experimental physicist. He is known for the Hanle effect. During World War II, he made contributions to the German nuclear energy project, also known as the Uranium Club...
, Gerhard Hoffmann
Gerhard Hoffmann
Gerhard Hoffmann was a German nuclear physicist. During World War II, he contributed to the German nuclear energy project, also known as the Uranium Club.-Education:...
, and Joos. After this, informal work began at the Georg-August University of Göttingen, and the group of physicists was known informally as the first Uranverein (Uranium Club) and formally as Arbeitsgemeinschaft für Kernphysik. The second Uranverein began after the Heereswaffenamt (HWA, Army Ordnance Office) squeezed out the Reichsforschungsrat
Reichsforschungsrat
The Reichsforschungsrat was created in Germany in 1937 under the Education Ministry for the purpose of centralized planning of all basic and applied research, with the exception of aeronautical research...
(RFR, Reich Research Council) of the REM and started the formal German nuclear energy project
German nuclear energy project
The German nuclear energy project, , was an attempted clandestine scientific effort led by Germany to develop and produce the atomic weapons during the events involving the World War II...
. The second Uranverein had its first meeting on 16 September 1939; the meeting was organized by Kurt Diebner
Kurt Diebner
Kurt Diebner was a German nuclear physicist who is well known for directing and administrating the German nuclear energy project, a secretive program aiming to built weapon of mass destruction for the Nazi Germany during the course of World War II...
and held in Berlin. It was then that Kaiser-Wilhelm Institut für Physik (KWIP, after World War II reorganized and renamed the Max Planck Institute for Physics
Max Planck Institute for Physics
Max Planck Institute for Physics is a physics institute in Munich, Germany that specializes in High Energy Physics and Astroparticle physics. It is part of the Max-Planck-Gesellschaft and is also known as the Werner Heisenberg Institute, after its first director.It was founded as the Kaiser Wilhelm...
), in Berlin-Dahlem
Dahlem (Berlin)
Dahlem is a locality of the Steglitz-Zehlendorf borough in southwestern Berlin. Until Berlin's 2001 administrative reform it was a part of the former borough of Zehlendorf. Dahlem is one of the most affluent parts of the city and home to the main campus of the Free University of Berlin with the...
, was placed under HWA authority, with Diebner as the administrative director, and the military control of the nuclear research commenced. Some of the research was carried out at the Versuchsstelle (testing station) of the HWA in Gottow; Diebner, was director of the facility. When it was apparent that the nuclear energy project would not make a decisive contribution to ending the war effort in the near term, control of the KWIP was returned to the its umbrella organization, the Kaiser-Wilhelm Gesellschaft (KWG, after World War II renamed the Max-Planck Gesellschaft
Max Planck Society
The Max Planck Society for the Advancement of Science is a formally independent non-governmental and non-profit association of German research institutes publicly funded by the federal and the 16 state governments of Germany....
) in January 1942 and control of the project was relinquished to the RFR that year. However, the HWA did maintain its testing station in Gottow and continue research there until the end of the war.
It was at the Gottow facility that Herrmann participated in nuclear fission
Nuclear fission
In nuclear physics and nuclear chemistry, nuclear fission is a nuclear reaction in which the nucleus of an atom splits into smaller parts , often producing free neutrons and photons , and releasing a tremendous amount of energy...
experiments designated G-I and G-III. The G-1 experiment had lattices of 6,800 uranium oxide cubes (about 25 tons) in the nuclear moderator paraffin. The work verified Karl Heinz Höcker’s
Karl-Heinz Höcker
Karl-Heinz Höcker was a German theoretical nuclear physicist who worked in the German Uranverein. After World War II, he worked at the university of Stuttgart and was the founder of the Institut für Kernenergetik und Energiesysteme.-Education:From 1935 to 1940, Höcker studied at the University of...
calculations that cubes were better than rods, and rods were better than plates. The G-III experiment was a small-scale design, but it generated an exceptionally high rate of neutron production. The G-III model was superior to nuclear fission chain reaction experiments that had been conducted at the KWIP in Berlin-Dahem, the University of Heidelberg, or the University of Leipzig
University of Leipzig
The University of Leipzig , located in Leipzig in the Free State of Saxony, Germany, is one of the oldest universities in the world and the second-oldest university in Germany...
. Herrmann also participated in work to explore the initiation of a nuclear reaction through the detonation of explosives.
In Russia
Near the close of World War II, the Soviet UnionSoviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....
sent special search teams into Germany to locate and deport German nuclear scientists or any others who could be of use to the Soviet atomic bomb project
Soviet atomic bomb project
The Soviet project to develop an atomic bomb , was a clandestine research and development program began during and post-World War II, in the wake of the Soviet Union's discovery of the United States' nuclear project...
. The Russian Alsos
Russian Alsos
The Russian Alsos was an operation which took place in early 1945 in Germany, Austria, and Czechoslovakia, and whose objectives were the exploitation of German atomic related facilities, intellectual materials, materiel resources, and scientific personnel for the benefit of the Soviet atomic bomb...
teams were headed by NKVD
NKVD
The People's Commissariat for Internal Affairs was the public and secret police organization of the Soviet Union that directly executed the rule of power of the Soviets, including political repression, during the era of Joseph Stalin....
Colonel General A. P. Zavenyagin and staffed with numerous scientists, from their only nuclear laboratory, attired in NKVD officer’s uniforms. In the autumn of 1945, Heinz Pose
Heinz Pose
Rudolf Heinz Pose was a German nuclear physicist.He did pioneering work which contributed to the understanding nuclear energy levels. He worked on the German nuclear energy project Uranverein. After World War II, the Soviet Union sent him to establish and head Laboratory V in Obninsk...
was offered the opportunity to work in the Soviet Union, which he accepted. He arrived in the Soviet Union, with his family, in February 1946. He was to establish and head Laboratory V (also known by the code name Malojaroslavets-10, after the nearby town by the same name) in Obninsk
Obninsk
Obninsk is a city in Kaluga Oblast, Russia, located southwest of Moscow. Population: Obninsk is one of the major Russian science cities. The first nuclear power plant in the world for the large-scale production of electricity opened here on June 27, 1954, and it also doubled as a training...
. The scientific staff at Laboratory V was to be both Soviet and German, the former being mostly political prisoners from the Gulag
Gulag
The Gulag was the government agency that administered the main Soviet forced labor camp systems. While the camps housed a wide range of convicts, from petty criminals to political prisoners, large numbers were convicted by simplified procedures, such as NKVD troikas and other instruments of...
or exiles; this type of facility is known as a Sharashka
Sharashka
Sharashka was an informal name for secret research and development laboratories in the Soviet Gulag labor camp system...
. (Laboratory B
Laboratory B in Sungul’
Laboratory B in Sungul’ was one of the laboratories under the 9th Chief Directorate of the NKVD that contributed to the Soviet atomic bomb project. It was created in 1946 and closed in 1955, when some of its personnel were merged with the second Soviet nuclear design and assembly facility. It was...
in Sungul’ was also a sharashka and working on the Soviet atomic bomb project. Notable Germans at Laboratory B were Hans-Joachim Born
Hans-Joachim Born
Hans-Joachim Born was a German radiochemist trained and educated at the Kaiser-Wilhelm-Institut für Chemie. Up to the end of World War II, he worked in Nikolaj Vladimirovich Timofeev-Resovskij’s Abteilung für Experimentelle Genetik, at the Kaiser-Wilhelm-Institut für Hirnforschung. He was taken...
, Alexander Catsch
Alexander Catsch
Alexander Catsch was a German-Russian medical doctor and radiation biologist. Up to the end of World War II, he worked in Nikolaj Vladimirovich Timefeev-Resovskij’s Abteilung für Experimentelle Genetik at the Kaiser-Wilhelm-Institut für Hirnforschung...
, Nikolaus Riehl
Nikolaus Riehl
Nikolaus Riehl was a German industrial nuclear chemist. He was head of the scientific headquarters of Auergesellschaft. When the Russians entered Berlin near the end of World War II, he was invited to the Soviet Union, where he stayed for 10 years...
, and Karl Zimmer
Karl Zimmer
Karl Günter Zimmer was a German physicist and radiation biologist, known for his work on the effects of ionizing radiation on DNA. In 1935, he published the major work, Über die Natur der Genmutation und der Genstruktur, with N. V...
. Notable Russians from the Gulag were N. V. Timofeev-Resovskij and S. A. Voznesenskij.)
On 5 March 1946, in order to staff his laboratory, Pose and NKVD General Kravchenko, along with two other officers, went to Germany for six months to hire scientists. Additionally, Pose procured equipment from the companies AEG
AEG
Allgemeine Elektricitäts-Gesellschaft was a German producer of electrical equipment founded in 1883 by Emil Rathenau....
, Carl Zeiss AG, Schott Jena
Schott Glass
SCHOTT AG is a German manufacturer of high-quality industrial glass products, its main markets are household appliances, pharmaceutical industries, solar energy, electronics, optics as well as automotive...
, and Mansfeld, which were in the Russian occupation zone.
Pose planned 16 laboratories for his institute, which was to include a chemistry laboratory and eight laboratories. Three heads of laboratories, Czulius, Herrmann, and Rexer, were Pose’s colleagues who worked with him at the German Army’s testing station in Gottow, under the Uranverein project. (See below: Internal Reports.) Eight laboratories in the institute were:
- Heinz Pose’s laboratory for nuclear processes.
- Werner Czulius’s laboratory for uranium reactors.
- Walter Herrmann’s laboratory for special issues of nuclear disintegration.
- Westmayer’s laboratory for systematic nuclear reactions.
- Professor Carl Friedrich Weiss’s laboratory for the study of natural and artificial radioactivity.
- Schmidt’s laboratory to study methodologies for nuclear measurement.
- Professor Ernst Rexer’sErnst RexerErnst Rexer was a German nuclear physicist. He worked on the German nuclear energy program during World War II. After the war, he was sent to Laboratory V, in Obninsk, to work on the Soviet atomic bomb project...
laboratory for applied nuclear physics. - Hans Jürgen von Oertzen’s laboratory to study cyclotrons and high voltage.
Internal Reports
The following reports were published in Kernphysikalische ForschungsberichteKernphysikalische Forschungsberichte
Kernphysikalische Forschungsberichte was an internal publication of the German Uranverein, which was initiated under the Heereswaffenamt in 1939; in 1942, supervision of the Uranverein was turned over to the Reichsforschungsrat under the Reichserziehungsministerium...
(Research Reports in Nuclear Physics), an internal publication of the German Uranverein
German nuclear energy project
The German nuclear energy project, , was an attempted clandestine scientific effort led by Germany to develop and produce the atomic weapons during the events involving the World War II...
. The reports were classified Top Secret, they had very limited distribution, and the authors were not allowed to keep copies. The reports were confiscated under the Allied Operation Alsos
Operation Alsos
Operation Alsos was an effort at the end of World War II by the Allies , branched off from the Manhattan Project, to investigate the German nuclear energy project, seize German nuclear resources, materials and personnel to further American research and to prevent their capture by the Soviets, and...
and sent to the United States Atomic Energy Commission
United States Atomic Energy Commission
The United States Atomic Energy Commission was an agency of the United States government established after World War II by Congress to foster and control the peace time development of atomic science and technology. President Harry S...
for evaluation. In 1971, the reports were declassified and returned to Germany. The reports are available at the Karlsruhe Nuclear Research Center and the American Institute of Physics
American Institute of Physics
The American Institute of Physics promotes science, the profession of physics, publishes physics journals, and produces publications for scientific and engineering societies. The AIP is made up of various member societies...
.
- F. Berkei, W. Borrmann, W. Czulius, Kurt Diebner, Georg Hartwig, K. H. Höcker, W. Herrmann, H. Pose, and Ernst Rexer Bericht über einen Würfelversuch mit Uranoxyd und Paraffin G-125 (dated before 26 November 1942)
- Kurt Diebner, Werner Czulius, W. Herrmann, Georg Hartwig, F. Berkei and E. Kamin Über die Neutronenvermehrung einer Anordnung aus Uranwürfeln und schwerem Wasser (G III) G-210
- Kurt Diebner, Georg Hartwig, W. Herrmann, H. Westmeyer, Werner Czulius, F. Berkei, and Karl-Heinz Höcker Vorläufige Mitteilung über einen Versuch mit Uranwüfeln und schwerem Eis als Bremssubstanz G-211 (April 1943)
- Kurt Diebner, Georg Hartwig, W. Herrmann, H. Westmeyer, Werner Czulius, F. Gerkei, and Karl-Heinz Höcker Bericht über einen Versuch mit Würfeln aus Uran-Metall und schwerem Eis G-212 (July 1943)
- W. Herrmann, Georg Hartwig, H. Rockwitz, W. Trinks, and H. Schaub Versuche über die Einleitung von Kernreaktionen durch die Wirkung explodierender Stoffe G-303 (1944)