What causes high background signal in SPECS PHOIBOS?
A high background signal in your SPECS Measuring Instruments could be due to a few reasons. First, check the detector preamplifier threshold. If that's not the issue, consider that the primary source might be generating excessive noise, and try using a second excitation source. Electrical interference could also be the cause; monitor the mains voltage and inspect ground connections.
What to do if I have low energy resolution on SPECS Measuring Instruments?
If you're experiencing low energy resolution with your SPECS Measuring Instruments, start by verifying the work function setting. Sample charging can also degrade resolution, so check the sample's ground connection and use an external electron flood gun for compensation. Incorrect voltages on the HSA (inner and outer sphere) can be a factor. Also, check the zero point of HSA3500.
Why are there intensity fluctuations in SPECS PHOIBOS Measuring Instruments?
Intensity fluctuations in SPECS Measuring Instruments can arise from several sources. Field emission at the exit slit of the HSA might be occurring; remove any wire edges from the mesh at the exit slit. Sparks at the anode side of the CEM may also cause fluctuations. Check spectra without excitation source and disconnect the preamplifier and measure again.
What causes a noisy spectrum in SPECS PHOIBOS?
A noisy spectrum in SPECS Measuring Instruments may be caused by several factors. Malfunctioning lenses can introduce noise; check tubus voltages and all analyzer (HSA 3500) voltages. Improper adjustment of the Slit Orbit mechanism can also contribute; check proper adjustment. Magnetic fields may also be the cause.
Why are peaks shifted equally in SPECS PHOIBOS?
If the peaks are shifted equally in your SPECS Measuring Instruments, the issue might be an incorrect amplification factor. Check U0 HSA3500.
What causes peaks to shift differently in SPECS PHOIBOS Measuring Instruments?
Peaks shifting differently in SPECS Measuring Instruments could indicate a malfunction of the counter board. Alternatively, one lens electrode might not be connected; run a spectrum at high speed and perform a crosstalk test with all lens tubes. A malfunction of the energy sweep generator could also be the cause; check the energy sweep.
How to troubleshoot no spectrum on SPECS Measuring Instruments?
If you're not seeing a spectrum on your SPECS Measuring Instruments, several factors could be at play. First, verify that the X-ray intensity is adequate by checking if the Ag sample photo current reads between 0.2 and 0.3 nA/W. A dirty or rough sample can also prevent a spectrum from appearing; try sputtering the sample until the C and O peaks disappear, or address any roughness. Ensure the analyzer-sample distance is correctly set to 40 mm. Other potential causes include issues with the lens system, HSA focus, low CEM yield (measure detector supply voltages), low conversion voltage (check conversion voltage), incorrect MCD preamplifier settings (check preamp settings), defective preamplifier channels (check operation of the preamplifier), magnetic fields (check for deviation based on ele...
Why is the intensity low on my SPECS PHOIBOS Measuring Instruments?
Low intensity on your SPECS Measuring Instruments could stem from several causes. Chemical peak broadening might be the issue, so try sputter cleaning or replacing the anode. If the sample is charging unevenly, use charge compensation with an electron flood gun. Noise or ripple on voltages (sample, spectrometer U0, detector, analyzer electrodes) can also cause this; ground the sample and check for hum and ripple, and verify the ground connections of all power supplies. Magnetic fields near the spheres could be interfering, so measure the magnetic field. Also, check the preamplifier setting. Incorrect detector supply voltage or a damaged carbon coating on the HSA spheres might be the problem, so check the detector supply voltages. Finally, humming and ripple on components like the sample, s...
General| Brand | SPECS |
|---|---|
| Model | PHOIBOS Series |
| Category | Measuring Instruments |
| Language | English |
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