i’m not here to talk about

3-13-2007 TD Pike YB n NginR 1

I’m not here to talk about

I’m going to talk about

ENGINEERING

Who would want to be an

Engineer?

Engineering is for NERDS

Recognize anyone?

Discuss

Math is BORING

Fourier Transforms

I don’t want to get stuck with a Goofy Career

I’m not sure I’d like driving a train

• Noun• engineer (plural engineers)1. A person who is qualified or

professionally engaged in any branch of engineering.

2. A person who, given a problem and a specific set of goals and constraints, finds a technical solution to the problem that satisfies those goals within those constraints. The goals and constraints may be technical, social, or business related.

3. (formerly) A person who operates an engine (such as a locomotive).

There aren’t many Job choices• Aerospace Engineer | Analyst | Application Engineer | Autocad Drafter

3-13-2007 TD Pike YB n NginR 10Really.

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Engineering isn’t Glamorous

Cruella De Vil

Reactor Core

ILL Research ReactorGrenoble, France

Cherenkov radiation• Cherenkov radiation is electromagnetic radiation emitted when a charged particle passes through

an insulator at a speed greater than the speed of light in that medium. The characteristic "blue glow" of nuclear reactors is due to Cherenkov radiation. It is named after Soviet scientist Pavel Alekseyevich Cherenkov, the 1958 Nobel Prize winner who was the first to rigorously characterize it.

• While relativity holds that the speed of light in a vacuum is a universal constant (c), the speed of light in a material may be significantly less than c. For example, the speed of light in water is only 0.75c. Matter can be accelerated beyond this speed during nuclear reactions and in particle accelerators. Cherenkov radiation results when a charged particle, most commonly an electron, exceeds the speed of light in a dielectric (electrically insulating) medium through which it passes.

• Moreover, the velocity of light that must be exceeded is the phase velocity rather than the group velocity. The phase velocity can be altered dramatically by employing a periodic medium, and in that case one can even achieve Cherenkov radiation with no minimum particle velocity — a phenomenon known as the Smith-Purcell effect. In a more complex periodic medium, such as a photonic crystal, one can also obtain a variety of other anomalous Cherenkov effects, such as radiation in a backwards direction (whereas ordinary Cherenkov radiation forms an acute angle with the particle velocity).

• As a charged particle travels, it disrupts the local electromagnetic field (EM) in its medium. Electrons in the atoms of the medium will be displaced and polarized by the passing EM field of a charged particle. Photons are emitted as an insulator's electrons restore themselves to equilibrium after the disruption has passed. (In a conductor, the EM disruption can be restored without emitting a photon.) In normal circumstances, these photons destructively interfere with each other and no radiation is detected. However, when the disruption travels faster than the photons themselves travel, the photons constructively interfere and intensify the observed radiation.

• A common analogy is the sonic boom of a supersonic aircraft or bullet. The sound waves generated by the supersonic body do not move fast enough to get out of the way of the body itself. Hence, the waves "stack up" and form a shock front. Similarly, a speed boat generates a large bow shock because it travels faster than waves can move on the surface of the water.

• In the same way, a superluminal charged particle generates a photonic shockwave as it travels through an insulator.

• In the figure, v is the velocity of the particle (red arrow), β; is v/c, n is the refractive index of the medium. The blue arrows are photons. So:

•Cherenkov radiation

Nuclear Spacecraft Propulsion

Engineering Achievements

• It took only fifteen seconds for the massive south arm of the Quebec Bridge to fall into

the St. Lawrence River in 1907, but the prelude to the catastrophe began years before.

Quebec Bridge 1907

TNB Ride

Mass & Frequency

Energy Absorber

San Francisco Bay Bridge Ride

Tacoma Narrows Bridge

GAME OVERGAME OVERGAME OVERGAME OVERGAME OVERGAME OVERGAME OVER

Inventions and Patents

• What’s the difference ?• Why invent ?• Why get a patent ?

Insomniac HelmetUS Patent Issued In 1992

Horse Diaper US Patent Issued In 1998

Postage Meter

Jarvik-7 •Dr. Jack G. Copeland implanted this Jarvik-7 heart in Michael Drummond on August 29, 1985. Drummond lived with the Jarvik-7 for a week before an organ transplant. It was the first authorized use of an artificial heart as a bridge to organ transplantation. •Robert Jarvik, MD is widely known as the inventor of the first successful permanent artificial heart, the Jarvik 7. In 1982, the first implantation of the Jarvik 7 in patient Barney Clark caught the attention of media around the world.

RR Jet Engine

Paper Yamaha

So, why be an Engineer?

MACS Overview

3-13-2007 TD Pike YB n NginR 33MACS Flyover

MACS & Collin

Emission & Absorption

20 DXALs

3-13-2007 TD Pike YB n NginR 37DXAL Movie

• Plasma cutting is a process used to cut steel and other metals (or sometimes other materials) using a plasma torch. In this process, an inert gas (in some units, compressed air) is blown at high speed out of a nozzle; at the same time an electrical arc is formed through that gas from the nozzle to the surface being cut, turning some of that gas to plasma. This plasma is sufficiently hot to melt the metal and moving sufficiently fast to blow molten metal away from the cut. The result is very much like cutting butter with a hot jet of air.

• The torch uses a two cycle approach to producing plasma. First, a high-voltage, low current circuit is used to initialize a very small high intensity spark within the torch body, thereby generating a small pocket of plasma gas. This is referred to as the pilot arc. The now conductive plasma contacts the workpiece, which is the anode. The plasma completes the circuit between the electrode and the workpiece, and the low voltage, high current now conducts. If the plasma cutter uses a high frequency/high voltage starting circuit, the circuit is usually turned off to avoid excessive consumable wear. The plasma, which is maintained between the workpiece and electrode, travels at over 15,000 km/h (over twelve times the speed of sound of the ambient air).

• Plasma is an effective means of cutting thin and thick materials alike. Handheld torches can usually cut up to 1/2 in (13 mm) thick steel plate, and stronger computer-controlled torches can pierce and cut steel up to 12 inches (300 mm) thick. Formerly, plasma cutters could only work on conductive materials, however new technologies allow the plasma ignition arc to be enclosed within the nozzle thus allowing the cutter to be used for non-conductive workpieces.

• Plasma cutters produce a very hot and very localized 'cone' to cut with. Because of this, they are extremely useful for cutting sheet metal in curved or angled shapes.

• Plasma torches were quite expensive, usually at least a thousand U.S. dollars. For this reason they were usually only found in professional welding shops and very well-stocked private garages and shops. However, modern plasma torches are becoming cheaper, and now are within the price range of many hobbyists. Older units may be very heavy, but still portable, while some newer ones with inverter technology weigh only a few pounds yet equal or exceed the capacities of older ones.

Plasma Cutting

Primary Ingredients

• Curiosity• Persistence• Patience

Essential Ethical Ingredients

• Cooperation• Respect the Work of Others• Listen Carefully (and take notes)• Become a Reliable Source

none of this was planned

OUT of the Blue

G S F C

JWST Project Information Mission Objective

– Study the origin and evolution of galaxies, stars and planetary systems

Optimized for infrared observations (0.6 –28 m) Organization

– Mission Lead: Goddard Space Flight Center– International collaboration with ESA & CSA – Prime Contractor: Northrop Grumman Space Technology– Instruments:

– Near Infrared Camera (NIRCam) – Univ. of Arizona– Near Infrared Spectrograph (NIRSpec) – ESA– Mid-Infrared Instrument (MIRI) – JPL/ESA– Fine Guidance Sensor (FGS) – CSA

Description– Deployable telescope w/ 6.5m diameter segmented adjustable primary mirror– Cryogenic temperature telescope and instruments for infrared performance– Launch in 2013 to Sun-Earth L2 – 5-year science mission (10-year goal)

Secondary Mirror (SM)

Primary Mirror (PM)Instrumentmodule

Sunshield Spacecraft Bus

Telescope

Cold, space-facing side

Warm, Sun-facing side

1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

www.JWST.nasa.gov

Concept Development Design, Fabrication, Assembly and Test

mission formulationauthorized

confirmation formission implementation

launch

science operations ...

JWST Project Overview

JWST Project InformationJWST Project Overview

Thermal Region 1- Components cooled to

cryogenic temperaturesThermal Region 2- Components maintained at

ambient temperatures on cold side of the observatory

Thermal Region 3- Components maintained at ambient temperatures

Thermal Region 1- Components cooled to

cryogenic temperaturesThermal Region 2- Components maintained at

ambient temperatures on cold side of the observatory

Thermal Region 3- Components maintained at ambient temperatures

Sunshield (SS)-5 layers to provide thermalshielding to allow OTE and ISIMto passively cool to required cryogenic temperatures

SS Layer 5

SS Layer 1

Sunshield Containment Shells

Sunshield (SS)-5 layers to provide thermalshielding to allow OTE and ISIMto passively cool to required cryogenic temperatures

SS Layer 5

SS Layer 1

Sunshield Containment Shells

Integrated Science Instrument Module (ISIM) - Located inside an OTE provided ISIM Enclosure- Contains 4 Science Instruments (NIRCam, NIRSpec

MIRI, FGS / TF)

ISIM Electronics Compartment (IEC)

Spacecraft Bus-Contains traditional “ambient” subsystems

Cryo-CoolerRadiator

Spacecraft Bus-Contains traditional “ambient” subsystems

Cryo-CoolerRadiator

Optical Telescope Element (OTE)- 6 meter Tri-Mirror Anastigmatic - 18 Segment Primary Mirror

OTE Backplane/ ISIM Enclosure

OTE DeploymentTower

OTE PrimaryMirror

OTE SecondaryMirror

Optical Telescope Element (OTE)- 6 meter Tri-Mirror Anastigmatic - 18 Segment Primary Mirror

OTE Backplane/ ISIM Enclosure

OTE DeploymentTower

OTE PrimaryMirror

OTE SecondaryMirror

Region 1: Instruments are mounted to ISIM structure and enclosed by observatory enclosure and radiators.

Region 2: ISIM Electronics Compartment (IEC), provides mounting surfaces and ambient thermally controlled environment for instrument electronics in close proximity to instruments

Region 3: Spacecraft houses ISIM Command and Data Handling (ICDH) and cryo-cooler compressor and cryo-cooler electronics

JWST Project InformationISIM System Overview

Purge Lines

Cones of Light (Test Sources)

ISIM Structure

Thermal Straps

NIRSpec

Radiator Baffle

Elec Harness

Kinematic Mount

NIRCam

Heat Switch

ISIM Structure InformationSDR4 Structure

ISIM Structure

SJ 100&

SJ1085 Prong Fitting

200 mm(7.87in.)

ReferenceCube

PGCube

TitaniumPlate

JWST ISIMTimothy D. Pike, P.E.

03-08-07

200 mm(7.87in.)

ReferenceCube

Modified Fitting(teal)

FrontView

NormalTo

V3 out of page

Show overall dims

FinalConfiguration

SJ 100&

SJ1085 Prong Fitting

the money will follow

Do What You Love

i’m not here to talk about

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