Here are the final links I’ve been meaning to upload!
The Crystal ISE
Here is the final link to the Parametric Down Conversion ISE that I was working on this year:
http://community.dur.ac.uk/foundation.science/qm/Crystal2014/CrystalISE2014.html
The Detector ISE
The detector ISE hasn’t changed much since last year but here is the link:
http://community.dur.ac.uk/foundation.science/qm/Detector2014/DurhamDetectorISE.html
A week’s gone by!
This week the main things I’ve been up to are:
-Continuing to improve the Parametric Down Conversion ISE using more excellent feedback from Antje
-Starting to develop an ISE which aims to explain the Poisson Distribution and its application in experiments within an optics lab!
Parametric Down Conversion ISE
The most recent version of the ISE can be found at:
www.dur.ac.uk/foundation.science/qm/CrystalWeek2/CrystalISE-2014-3.4.html
Some of the changes made this week:
-More layout changes- this time with the count rate displays so that their layout mimics that of the lab apparatus
-Goals in general have been made more visible. This has been done by where possible making them fade in, as this is more eye catching than appearing suddenly, as well as changing the colour scheme and making the font larger.
-Most of the sliders have been changed to 180 degrees instead of 360 as this is simpler.
-Some text problems were sorted out- such as equations that were hard to see and text “leaking” out of boxes.
-The polarisers now move back into their box once removed from the collection optics- which they oddly stopped doing for no discernible reason…
I expect I’ll be posting about the Poissonian distribution ISE soon, it’s still fairly early days
Thanks!
Katherine
It’s been a year and I’m back working on Interactive Screen Experiments!
Here is the link Crystal ISE I have been working on:
http://community.dur.ac.uk/foundation.science/qm/Crystal/CrystalISE-2014-2.7.html
Some improvements I’ve made this week, using some of the feedback very kindly given to us by Dr. Antje Kohnle:
-I’ve changed the greek letter used to describe the angle between the collection optics and to alpha, as its more commonly used with angles than psi, which I used previously
-The angle mentioned above is now to 2 decimal places
-For the polarisers, clickable arrows have been replaced with sliders
The Goals Section
-The goals now do not remain ticked when the goal is no longer being completed,
-If you brush past the optimum configuration (in order to achieve) the tick will show briefly
-As its not possible to complete the goals in the Single or Double Crystal Tab without having optimised the conditions ( and achieved the Goal) in the first tab, a message appears in the Goal section alerting the user of this (if the Goal hasn’t been achieved).
General Layout
-The polariser layout in the panel (where they stored in the and Single Crystal and Double Crystal tab) to the right of the labspace now more closely mimics the layout in the lab, to make it clearer where the user should drag the polarisers.
As well as fixing some strange layout changes that may have either been a product of browser updates or the fact I’ve changed to a newer version of Adobe Edge Animate.
That’s all I think, as ever any feedback is welcome!
Thanks,
Katherine
Here’s a quick guide to the Detector ISE
Here’s a quick guide to the Crystal ISE
Hello! So as not to overload the university’s server too much I’ve taken all previous versions off there, so now the only two links that will work are located at:
Crystal ISE
http://www.dur.ac.uk/foundation.science/qm/CrystalISEDurham.html
The newest feature on the crystal ISE is an extra tab which allows the user to enter results in order to violate Bell’s Inequality,
Detector ISE
http://www.dur.ac.uk/foundation.science/qm/DetectorISEDurham.html
During the next week I’ll be posting two videos showing me using each of the ISE’s, it will probably be a bit more helping than me writing down a big list of the features.
Another quick update about the Detector ISE
Here’s it location
http://www.dur.ac.uk/foundation.science/qm/DetectorISE2.0.html
And here’s a screenshot:
This version includes the hover messages (one for the mirror shown above) that I mentioned in the Crystal ISE post.
I think the only thing left to do with this ISE is to finish adding the apparatus information.
As I said, very quick post!
Katherine
Apologies for the lack of posting!
The current version of the crystal ISE can be located at
http://www.dur.ac.uk/foundation.science/qm/CrystalISE13.3.html
Here is a screenshot:
Although there are still a few things to sort out, here are the current features:
Settings – Here is a password protected area (the password is currently “Katherine”) where you can turn access to certain parts of the ISE off. Currently you can only turn the apparatus information off. When this feature is turned off, and apparatus is clicked on, an “Access Denied” message pops up.
Start Experiment -There are currently 3 tabs
In all three tabs -Apparatus
In all the tabs all the apparatus can be clicked on (the collection optics must be double clicked so this feature does not interfere with dragging) to direct you to pages of information (some aren’t quite finished yet) about them (yet to be added are pop ups which tell you this when the mouse hovers over the apparatus, like in the Detector ISE).
1st tab Parametric Down Conversion
There is also a “Goals” section, currently “Maximise the coincidence count” which is achieved when the laser is on, and the angle of the collection optics is 3 degrees. There is of course potential to add more goals.
The laser (when clicked on) has it’s own mini ISE, relating to controlling the laser diode’s current and the diode’s response to this.
In this tab the lower Collection Optics can be dragged up and down, the closer it is to symmetrical with the other detector at the half angle 3 degrees, the higher the coincidence count (if the laser has been turned on). The detector cannot be moved outside of this tab.
Tab 2 Single Crystal
In this tab the count rate is affected by the angle of the waveplate (reaching a maximum coincidence count at 220 degrees), as well as the polarisers. These polarisers can be dragged onto the Collection Optics, their rotation controlled (which in turn affects the count rate and coincidence count) and also removed from the Collection Optics.
Tab 3 Double Crystal
This tab is very similar to the previous, but due to a double crystal being used instead of a single crystal, the count rate and coincidence count are affected differently by the changes the user makes, and the waveplate is fixed at 0, 45 or 90 degrees.
NB: There’s currently no accidental count or dark count added, so the lab is under ideal conditions
Yet to be added
Some of the apparatus information
More goals
A graphing feature (similar to the one used in mini Laser ISE) for the coincidence count (or count rate)
Another tab, explaining Bell’s inequality, how it can be violated and the implication of this regarding the “hidden variables” theory. Maybe include a link to or embed a video lesson on the subject.
Currently, turning the Collection Optics (using the arrows in Tab 1 (Parametric Down Conversion) has no effect on readings, it should soon!
The newest version of the Detector ISE should now work on all browsers as I’ve uploaded it into the Durham University webserver and I’m no longer relying on DropBox to act as a temporary server!
Here is its location:
http://www.dur.ac.uk/foundation.science/qm/DetectorISE1.2.html
And here is a screenshot:
Although there are still some problems to iron out here are some of the new features:
-The collection optics can now be dragged from an initial position into the lab space and can then be dragged in and out of the path of the laser, which in turn affects the count rate.
-The colour scheme has been made a bit more “friendly” as the last one I’ll admit was very grey and dull!
-A goal section has now been added, when the goals outlined here are achieved, a green tick and a congratulatory message appears. At the moment there are two goals: maximising the count rate and minimising the dark count, with the potential to add more if needs be.
Also in previous versions titles have had this format:
However, light text on a dark background is hard to read, especially for the visually impaired, also block capitals are advised against. Giving more thought to making this ISE more accessible to the visually impaired, guidelines suggest making all text at least size 20 point, and the advised font type is Ariel (I’ve also used sans-serif) and this has been followed within this project. (Source: SCIE (Social Care Institute for Excellence) Accessibility Guidelines, June 2005 http://www.scie.org.uk/publications/misc/accessguidelinespublications.pdf)
Thanks for reading!
Katherine
Detector ISE
I noticed that the slider in the Detector ISE was behaving erratically moving further than you drag it at random times, also that pressing buttons in a certain order meant the lights would randomly go off – both of these problems have been fixed and the ISE is at the same location:
https://dl.dropboxusercontent.com/u/83693404/DetectorPublish2/DetectorISE1.2.html
Other features added this version:
-The count rate now has a saturation point of 30MHz
-A smaller, more realistic count rate has been added
-Turning the laser on now results in a count rate increase of 2MHz
-The graph line is a bit darker and hopefully clearer
-Most of the lab equipment can now be clicked on, navigating the user to an information page on the apparatus.
Features yet to be added:
-More apparatus information (equipment spec etc.)
-A numerical count rate (perhaps displayed on the frequency counter?)
Crystal ISE
Today I’ve been mostly photoshopping pictures of the detector to be used as a draggable animation in the Crystal ISE, here’s a link to a quick program I made displaying it:
https://dl.dropboxusercontent.com/u/83693404/BottomDetectorMoving/BottomDetectorAnimation.html
and here’s a screenshot:
Very rough edit so far though!
Thanks for reading!
Katherine
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