Tuesday, October 18, 2011
Cloud Detection Chamber
http://www.furryelephant.com/content/radioactivity/detecting-ionizing-radiation/
Sunday, July 31, 2011
Saturday, July 30, 2011
608 Write Up Part II
On Friday I'll give you yet more information. Essentially it relates to an entire chapter in the Physics textbook. Some of the different types of particles, (and their compositions), their interactions with magnetism, what 'radiation' happens to be, the sources of the particles, the math to calculate the curvatures of the paths as well as the energies (mev -- electron volts ) of the particles, the math related to the strength of the magnet (Gauss), Lorenz's law, etc. The nice thing for students is that the basic device that lead to all of this science is rather easily constructed.
By way of contrast, the subsequently identified particles require those massive mega-billion dollar super-colliders to identify. Depending upon the cost of dry ice, I'll say a 'cloud chamber' costs roughly $100.00.
Additionally, this science began when a guy who liked to hike mountains did so and began to contemplate myst; not your typical standardized-test environment for learning. A few decades later nobel prizes were being awarded for this line of inquiry.
By way of contrast, the subsequently identified particles require those massive mega-billion dollar super-colliders to identify. Depending upon the cost of dry ice, I'll say a 'cloud chamber' costs roughly $100.00.
Additionally, this science began when a guy who liked to hike mountains did so and began to contemplate myst; not your typical standardized-test environment for learning. A few decades later nobel prizes were being awarded for this line of inquiry.
608 Write Up
On my old computer I had a (flip share self-recorded) video from PBS about 10 minutes in length generally showing a cloud chamber and discussing the use of same to prove the existence of antimatter. When I can I’ll re-record it and put it on this computer and show it to you. In a nutshell, the anti-matter particle curved in exactly the OPPOSITE direction in which it would “normally” have curved (thus, it was an electron with a positive charge aka antimatter).
PARTICLE RADIATION DETECTION METHOD WITH THE USE OF A CLOUD CHAMBER
INTRODUCTION
Various different particles (i.e., smaller than atoms) have distinct uses in science and industry; one of many examples is a Positron Emission Tomography scan (aka a PET scan). Hence, it is important to be able to identify and be familiar with the various particles. Here we will identify a type of charged/radiated particles (+ or -) by exploiting the physics of magnetic forces on charged particles within a Cloud Chamber. We will also discuss the properties of other particles.
HYPOTHESIS
When particles -- in our case alpha particles -- interact with cooled and saturated water in a sealed environment (a “Cloud Chamber”) the particles are ionized. [See link to youtube video, below.] The ions thereby become condensation nuclei around which mist forms. The ionized particles’ high energies in conjunction with the mist creates visible trails. The inherent and discrete properties of the particles -- which will create specific trails -- should allow an observer to identify the specific particles by way of their identifying trails, and, further, pursuent to Lorentz’s law, the application of a uniform magnetic field should allow an observer to distinguish between positively and negatively charged particles.
APPROACH
A Cloud Chamber with a magnet will be constructed. The Cloud Chamber will demonstrate that the radii of circular trajectories of alpha particles are inversely proportional to the strength of the magnetic field. Additionally, the experiment will demonstrate the connection between the particles’ orbital directions and their charge types using alpha radiation sources available in-house. Additionally, the experiment will be filmed.
RESULTS
1. The construction of a fully operational Cloud Chamber with magnetic field instrumentation attached.
2. The creation of a film record of the particle trajectories in a magnetic field.
3. The composition of a physics laboratory experiment for the HU physics lab manual to include (i) background and (ii) procedures for an introductory physics class.
Hu’s construction is much different, but here is a basic youtube video:
http://youtu.be/chxv5G6UFl0
ASSESSMENT
Various types of assessments are anticipated.
PARTICLE RADIATION DETECTION METHOD WITH THE USE OF A CLOUD CHAMBER
INTRODUCTION
Various different particles (i.e., smaller than atoms) have distinct uses in science and industry; one of many examples is a Positron Emission Tomography scan (aka a PET scan). Hence, it is important to be able to identify and be familiar with the various particles. Here we will identify a type of charged/radiated particles (+ or -) by exploiting the physics of magnetic forces on charged particles within a Cloud Chamber. We will also discuss the properties of other particles.
HYPOTHESIS
When particles -- in our case alpha particles -- interact with cooled and saturated water in a sealed environment (a “Cloud Chamber”) the particles are ionized. [See link to youtube video, below.] The ions thereby become condensation nuclei around which mist forms. The ionized particles’ high energies in conjunction with the mist creates visible trails. The inherent and discrete properties of the particles -- which will create specific trails -- should allow an observer to identify the specific particles by way of their identifying trails, and, further, pursuent to Lorentz’s law, the application of a uniform magnetic field should allow an observer to distinguish between positively and negatively charged particles.
APPROACH
A Cloud Chamber with a magnet will be constructed. The Cloud Chamber will demonstrate that the radii of circular trajectories of alpha particles are inversely proportional to the strength of the magnetic field. Additionally, the experiment will demonstrate the connection between the particles’ orbital directions and their charge types using alpha radiation sources available in-house. Additionally, the experiment will be filmed.
RESULTS
1. The construction of a fully operational Cloud Chamber with magnetic field instrumentation attached.
2. The creation of a film record of the particle trajectories in a magnetic field.
3. The composition of a physics laboratory experiment for the HU physics lab manual to include (i) background and (ii) procedures for an introductory physics class.
Hu’s construction is much different, but here is a basic youtube video:
http://youtu.be/chxv5G6UFl0
ASSESSMENT
Various types of assessments are anticipated.
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