|Panter test 1996 at Munich|
The whole setup in controlled from this control room. Part of this room is
filled with computer terminals to control to temperature, pressure and
X-Ray source of the facility. The other half is filled with our computers that
control the instrument that is being tested. On this picture you can see
Stef (The Netherlands), Andy (USA) and Steve (England).
To give you an idea of the machinery that is needed to test out equipment, this
picture shows you just the X-Ray generator and the monochromator. This device
can pass on a small band in the X-Ray spectrum, the rest is filtered out.
We use this device to see how our detector responds to specific energies
in the X-Ray band.
Here you see a few people working inside the large vacuum tank (about 8
meters long). There are connecting all the wires to the instrument. You can
see that the instrument is on a so called translation table. This is a platform
that can move in all directions to position the instrument inside the tank.
Since the tank will close during the experiment (it will be pumped vacuum)
controlling this translation table is done remotely. On this picture are
Ruud, John and Steve.
This is a picture taken from inside the tank. You can see our instrument on
the left. The blue sheet is a cover to keep every dust particle outside the
instrument. That is also the reason why we are dressed up so funny. We are
working in an almost dust-free area. On the right you can see the old ROSAT
PSPC (Proportional Counter) that we use for calibrating the amount of
X-Ray flux. Steve looks very happy here - this was before we noticed that
there was a defect in one of the wires. Shouldn't you be doing something
This is the grating box. It is made from Berilium Oxide and it acts like
a prism, but then for X-Rays. Only 40 out of the 202 elements are in the
box. This was enough for us to do the testing.
This is the mirror structure. You can not use normal mirrors like with
visible light, because photons with small wavelengths don't curve when going
through glass. The only way you can change the path of these photons is
by scattering them on a piece of high reflective metal under a very small
angle. To get a well defined focus photons are scattered twice (on a
paraboloid and a hyperboloid). The surface is coated with gold for high
This is the first plot that tells us that we are within the specs of the
instrument. It shows the spectral resolution of the spectrometer. Since we
realized that this was the moment that we all waited for we all signed it and
faxed it to all participating institutes.
The second plot shows another great moment. The respons of the instrument to
scattering photons on the mirror is compared to the ray-traced simulation
code written by Frits Paerels. After months of being unsure if he had done
the right thing, this plot shows that he was right. What a relief!
And now, the moment that we've all been waiting for. The proof that I was
there myself. What a horrible looking dude. Mommy, help!!!! There is a
strange looking man with funny clothes on the screen.
This document was last updated on 24/01/97